Gitea: Permanent Fork PR Workflow Approval Gate Bypass

| Field | Value | |-------|-------| | Identifier researcher-assigned | GITEA-2026-004 | | Product | Gitea self-hosted Git service | | Component | Gitea Actions — fork pull request approval gate | | Affected versions | All Gitea releases v1.20.0 and later, including the latest main...

Gitea: LFS authentication bypass via malformed SSH sub-verb allows unauthorized read access to private repositories

Summary A flaw in SSH LFS sub-verb handling allows any authenticated SSH user to obtain valid LFS credentials for any repository on the instance, including private repositories they have no access to. This enables unauthorized download of all LFS objects from any private repository. Details In...

Gitea: Unauthenticated ReDoS via CODEOWNERS pattern matching allows denial of service

This issue has been found by a security agent and review by myself. Gitea's CODEOWNERS feature uses the regexp2 library to match file paths against ownership rules. User-supplied patterns are passed directly to regexp2.Compile with no sanitisation and no match timeout. This allows an attacker to...

Gitea: SSRF via HTTP Redirect in Repository Migration

Summary Gitea 1.25.4 validates the initial URL provided to the repository migration endpoint POST /api/v1/repos/migrate and correctly blocks requests to internal addresses like 127.0.0.1 or RFC1918 ranges. However, if the initial URL points to an attacker-controlled server that responds with an...

Gitea: API access token scope enforcement bypass on repository RSS/Atom feed endpoints leaks private repository commit data

Summary A Gitea personal access token PAT restricted to a non-repository scope e.g. read:issue can read the commit history of any private repository the token owner can access, via the repository RSS/Atom feed endpoints. The same token is correctly denied 403 on /raw, /media, /archive, and the...

Gitea: Git LFS object reuse allows non-Code access to authorize private source objects

Summary A user with Code write access to one repository may be able to associate an existing Git LFS object from a private source repository with their target repository, even when they do not have Code access to the source repository that currently owns the LFS object. The issue appears to be...

Gitea Docker image: `REVERSE_PROXY_TRUSTED_PROXIES = *` default lets any source IP impersonate any user via `X-WEBAUTH-USER`

Summary The Gitea Docker images ship an app.ini template that hard-codes: REVERSEPROXYTRUSTEDPROXIES = The documented default for this setting, in custom/conf/app.example.ini, is 127.0.0.0/8,::1/128, i.e. only loopback is trusted. When an admin enables ENABLEREVERSEPROXYAUTHENTICATION = true to p...

Gitea: Incomplete SSRF Protection in Webhook and Migration Allow-list Default Filter

Summary Gitea's default SSRF allow-list MatchBuiltinExternal, used by both webhook delivery and repository migrations relies on Go's standard library net.IP.IsPrivate, which only covers RFC 1918 and RFC 4193. As a result, several IP ranges commonly used for cloud metadata services, internal...

Gitea: API Fork Endpoint Authorization Bypass Allows Organization Members to Bypass Repository Creation Restrictions

Summary The API endpoint used to fork repositories into organizations performs a weaker authorization check than the corresponding web UI and other repository creation endpoints. When a repository is forked into an organization through the API, the endpoint only verifies that the user is an...

Gitea: Privilege Escalation via Access Token Scope Escalation in API

Gitea's API endpoint for creating Personal Access Tokens POST /users/username/tokens is protected by a middleware reqBasicOrRevProxyAuth that is intended to require password-based authentication, preventing a compromised token from being used to mint new ones. However, when a token is passed in t...

Gitea: Denial of Service (CPU & Memory Exhaustion) via O(N^2) String Concatenation in Debian Package Upload

Gitea's Debian package registry parser contains an unbounded decompression vulnerability in ParseControlFile. When processing an uploaded .deb file, the parser decompresses control.tar.gz and copies the entire uncompressed stream into a strings.Builder via a TeeReader, with no limit on how much...

Gitea: Private Repository Existence Disclosure via go-get Meta Endpoint

| Field | Value | |-------|-------| | Affected File | routers/web/repo/githttp.go, services/context/repo.go | | Affected Functions | httpBase, EarlyResponseForGoGetMeta | | Affected Lines | githttp.go:63–66, services/context/repo.go:374–396 | | Prerequisite | None — fully unauthenticated | ---...

Gitea: Cross-repository issue/comment attachment re-linking can expose private attachment content

Summary Gitea's issue and comment attachment update paths accept attachment UUIDs without verifying that each attachment belongs to the target issue/comment repository. If an authenticated attacker knows a victim attachment UUID, they can re-link that attachment to an attacker-controlled issue or...

Gitea: Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim

Summary When oauth2client UPDATEAVATAR = true is enabled, Gitea fetches the avatar URL received from an OAuth2/OIDC provider using Go's default HTTP client. The URL comes from the user's OAuth/OIDC avatar value, commonly the OIDC picture claim. The affected code path calls http.Geturl without...

Gitea: OAuth token introspection returns metadata of tokens issued to other clients (RFC 7662 section 4 violation)

Live reproduction against Gitea 1.26.1 Setup: Gitea 1.26.1 docker stack with two users admin and victim and two OAuth applications owned by different users: Client A: id=5dda747d-7fdd-4694-85ff-ce4f893ce51e owner=admin Client B: id=588f778f-4a41-4914-ae01-85d776c369db owner=victim admin runs an...

Gitea: Unbounded Arch package file metadata can cause resource amplification in Gitea package uploads

Summary Hello Gitea Security Team, Thank you for your continued work on Gitea. I would like to responsibly report a potential availability-impact issue that I observed in Gitea’s Arch package registry implementation. During local testing, I noticed that Gitea records non-dot regular file entries...

Gitea Remember-Me Token Theft Not Invalidating Attacker Session

The vulnerability is in the Remember-Me giteaincredible token validation logic, specifically when handling a compromised token hash mismatch. The vulnerable function is this one: https://github.com/go-gitea/gitea/blob/689ace1ce28fd74244b8aa335d9928cdbf6b22f9/services/auth/authtoken.goL33-L64...

Gitea: draft release attachment disclosure via missing web authorization

Summary Gitea's draft-release access control is enforced only on the API release endpoints /api/v1/repos/owner/repo/releases/id and its /assets/... sub-routes but not on the web-level UUID-based attachment endpoints /attachments/uuid, /owner/repo/attachments/uuid,...

Gitea: Release attachment extension allowlist bypass via web release edit form (variant of CVE-2025-68939)

Summary The web handler EditReleasePost routers/web/repo/release.go reads form fields with prefix attachment-edit-uuid into a mapuuidnewName, passes that map to releaseservice.UpdateRelease, which writes the new name to the database via repomodel.UpdateAttachmentByUUID WITHOUT calling upload.Veri...

Gitea: Token public-only scope bypassed on Limited-visibility owners (Repository + Package categories) — residual after CVE-2026-25714 / PR #37118

Summary After PR 37118 / CVE-2026-25714 fix: Unify public-only token filtering in API queries and repo access checks, merged 2026-05-18, backport 37773 to 1.26.2 — the May 2026 unification pass for public-only token filtering, reporter Medoedus per the 1.26.2 release notes, the public-only PAT...

Gitea: Branch Protection Bypass via PR Retargeting Preserves Stale `official` Approval Flag

Summary Gitea does not re-evaluate the official flag on existing pull request reviews when a PR's target branch is changed. An attacker with write access to a repository can obtain an official: true approval on a PR targeting an unprotected branch, then retarget the PR to a protected branch e.g.,...

Gitea CVE-2026-20800 sibling endpoints not covered: revoked user still reads private repo objects via `/api/v1/user/starred` and private issue titles via `/api/v1/user/times`

Summary CVE-2026-20800 fixed private-info leakage to revoked users only for the notification endpoint. Two sibling endpoints that return data keyed on the caller's own relationship still do not re-check repo access at output time: - GET /api/v1/user/starred — getStarredRepos computes a per-repo...

Gitea: Webhooks created by a collaborator keep firing after their repo access is revoked → ongoing real-time exfiltration of private repo content

Affected product Gitea — services/repository/collaboration.go DeleteCollaboration + webhook delivery Summary When a collaborator with admin permission on a private repo creates a webhook, that webhook keeps firing after the collaborator's access is revoked. Gitea's revocation cleanup...

GitPython: command injection via unguarded Git options in `Repo.archive()`, `git.ls_remote()`, and arbitrary file overwrite via `Repo.iter_commits()` / `Repo.blame()`

Summary GitPython spawns the real git binary with an argument vector built from caller-supplied values. To prevent argument injection, GitPython maintains denylists of "unsafe" Git options --upload-pack, --receive-pack, --exec, -c, --config, … that can be abused to run arbitrary commands, and...

GitPython: Command Injection via git long-option prefix abbreviation bypass of CVE-2026-42215 blocklist

Command injection via long-option prefix abbreviation bypassing checkunsafeoptions incomplete fix of CVE-2026-42215 / GHSA-rpm5-65cw-6hj4 Component: gitpython-developers/GitPython PyPI: GitPython Affected: all versions carrying the 3.1.47 blocklist fix, through current main verified at commit...

GitPython unsafe clone option gate bypass through joined short options

GitPython version 3.1.50 blocks unsafe git clone options such as --upload-pack, -u, --config, and -c unless callers explicitly pass allowunsafeoptions=True. However, the default unsafe-option gate does not recognize joined short-option forms such as -u/path/to/helper. Git itself accepts -u as the...

SVGO removeScripts plugin leaves some executable scripts intact

Summary SVGO's removeScripts plugin disabled by default removes scripts from the SVG, however executable scripts were left intact in some cases. If a consumer relied on this plugin for sanitization and served them to users, these SVGs could open up doors to XSS. Details SVGO has a plugin for...

DOMPurify: `CUSTOM_ELEMENT_HANDLING` bypasses `afterSanitizeElements` for allowed custom elements.

Summary There is a possible hook-policy inconsistency in DOMPurify 3.4.11 involving CUSTOMELEMENTHANDLING. When a custom element is allowed via CUSTOMELEMENTHANDLING.tagNameCheck, it appears that the element does not go through afterSanitizeElements in the same way as a normal element. As a resul...

jackson-databind: `@JsonView` bypass for creator properties with `@JsonTypeInfo(include=As.EXTERNAL_PROPERTY)`

Summary In BeanDeserializer.deserializeUsingPropertyBasedWithExternalTypeId, the active-view @JsonView filter was applied only to the regular bean-property branch; the creator-property branch performed no creatorProp.visibleInViewactiveView check. A constructor parameter annotated with both...

@vitest/browser: Browser Mode provider commands bypass the file-access permission gate

Summary Browser Mode exposes a set of built-in "commands" that run on the Node.js side of the test runner and can touch the local filesystem taking screenshots, managing Playwright traces, uploading files for , comparing screenshots. Several of these commands accept a file path from the browser a...

Credential confusion in @sigstore/oci can leak registry credentials to an attacker-controlled registry

Impact This is a credential-exposure / credential-confusion issue. getRegistryCredentials reads credentials from the Docker config file /.docker/config.json and selects an entry by checking whether any configured auth key contains the target registry string: js Object.keysdockerConfig.auths ||...

jackson-databind: @JsonIgnore on a Record property is bypassed with a PropertyNamingStrategy

Summary For Java Records, POJOPropertiesCollector.removeUnwantedIgnorals records a @JsonIgnore-annotated component under its original implicit name before renameUsing applies the PropertyNamingStrategy. After the rename, ignoredPropertyNames still holds only the pre-rename name, so ignorableProps...

Gitea: Repository Migration Follows Git HTTP Redirects After URL Allow/Block Validation, Enabling Internal Git Repository Exfiltration

Repository Migration Follows Git HTTP Redirects After URL Allow/Block Validation, Enabling Internal Git Repository Exfiltration Summary Gitea validates the user-supplied repository migration URL, but the actual clone and later mirror fetch operations are performed by the Git command-line client...

pyasn1: Uncontrolled resource consumption when converting decoded REAL values

Impact The univ.Real type converted its mantissa, base, exponent value to a Python float using exact big-integer exponentiation. A BER/CER/DER-encoded REAL value only a few bytes long can carry a very large exponent, causing this computation to attempt to materialize an astronomically large...

pyasn1: Quadratic complexity in OBJECT IDENTIFIER and RELATIVE-OID processing allows denial of service

Impact The BER/CER/DER decoders process OBJECT IDENTIFIER and RELATIVE-OID values in quadratic time relative to the number of arcs. A small crafted payload tens of kilobytes containing an OID with many arcs consumes seconds of CPU per decode call, allowing denial of service in any application tha...

pyasn1 BER/CER/DER decoder denial of service via unbounded long-form tag IDs

Impact The BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets in a loop with no upper bound on the size of the tag ID. A crafted input can force the decoder to build an arbitrarily large integer, with CPU cost growing quadratically in input size...

setuptools: MANIFEST.in exclusion bypass in sdist via Unicode normalization collision (NFC/NFD) on macOS APFS/HFS+

Summary When building a source distribution python -m build --sdist / setup.py sdist, setuptools' FileList applies MANIFEST.in directives exclude, global-exclude, recursive-exclude, prune by matching a compiled glob against on-disk file names byte-for-byte, with no Unicode normalization. On...

OpenTelemetry JavaScript: Denial of service in `JaegerPropagator` via unhandled exception on a malformed header

Summary @opentelemetry/propagator-jaeger decodes incoming HTTP header values with decodeURIComponent without handling decode errors. A single request carrying a malformed percent-encoded value for example a bare % in an uber-trace-id or uberctx- header throws an uncaught URIError, terminating any...

linkify-it: Quadratic-complexity DoS via the `mailto:` validator scan-loop on attacker text

Summary linkify-it's schema-scan loop .test / .match, the documented public API invokes the mailto: schema validator at every mailto: occurrence in the input text. For each occurrence the validator does text.slicepos an On copy and runs an email regex whose local-part class srcemailname greedily...

aws-cdk-lib: OS Command Injection in NodejsFunction Docker Bundling

Summary AWS CDK aws-cdk-lib is an open-source framework for defining cloud infrastructure in code and provisioning it through AWS CloudFormation. OS command injection issue in the NodejsFunction Docker bundling pipeline in aws-cdk-lib before 2.260.0 that might allow an actor who controls dependen...

fast-uri vulnerable to host confusion via failed IDN canonicalization

Impact fast-uri versions = 2.3.1, = 4.0.0 fail to canonicalize Unicode/IDN hostnames for HTTP-family URLs. The IDN conversion path calls URL.domainToASCII... on the global WHATWG URL constructor, where that helper does not exist. The resulting TypeError is silently routed into parsed.error, but...

Immutabl: Hash-collision algorithmic complexity denial of service in Immutable.Map/Set

Summary Immutable.Map and Immutable.Set keep keys that share the same 32-bit hash in a collision bucket that is scanned linearly. The string hash is public and deterministic, so an attacker who controls the keys inserted into a Map can craft many keys that all collide, degrading insertion and...

Immutable.js `List` 32-bit trie overflow → unrecoverable DoS

Summary Listset, ListsetSize, ListsetIn, ListupdateIn and the functional set / setIn / updateIn mishandle an index or size in the range 2 30, 2 31: - On an empty List the operation enters an uncatchable infinite loop a tight CPU spin; a surrounding try/catch never regains control. Only killing th...

guzzlehttp/psr7: Host Confusion via Weak URI Host Validation

Impact guzzlehttp/psr7 did not reject URI host components containing authority delimiters /, ?, , @, or , an embedded port such as host:8080, or IPv6 brackets that do not frame the host such as ::1 or ::1. Uri::assertValidHost rejected only control characters, so these malformed hosts were...

websocket-driver-ruby: Denial of service via malformed Host header

Impact If this library is used to implement a WebSocket server on top of a TCP server, by using the WebSocket::Driver.server method, then a client can cause the server to crash by sending a Host header that is not a valid host:port string. When this happens, a URI::InvalidURIError exception is...

hono/jsx does not isolate context per request, leading to cross-request data disclosure

Summary hono/jsx did not isolate context values per request during server-side rendering. While an async component was suspended on await, its provided context value stayed observable to other requests rendering concurrently, so useContext could return a value from a different in-flight request...

Hono: Server-Side XSS via JSX Escaping Bypass in cx() Utility

Summary cx in hono/css composes class names from plain strings but marks the result as already-escaped without HTML-escaping the input. When the result is used as a JSX class attribute during server-side rendering, the value is written into the attribute unescaped, so untrusted input can break ou...

Hono: API Gateway v1 adapter can drop a distinct repeated request header value during de-duplication

Summary The AWS API Gateway v1 adapter can drop a distinct repeated request header value. When a header appears multiple times, the adapter de-duplicates values using a substring comparison instead of an exact match, so a value that is a substring of another value of the same header is omitted fo...

Node.js Adapter for Hono: Path traversal in `serve-static` on Windows via encoded backslash (`%5C`)

The same as the hono core Path traversal in serve-static on Windows via encoded backslash %5C. Summary On Windows hosts, an encoded backslash %5C in the request path decodes to , which the Windows path resolver treats as a separator. serve-static then resolves a single URL segment such as...

PostgreSQL JDBC Driver: Silent channel-binding authentication downgrade via unsupported certificate algorithms

Impact channelBinding=require connections can be silently downgraded from SCRAM-SHA-256-PLUS with channel binding to plain SCRAM-SHA-256 without it, losing the man-in-the-middle protection the setting is meant to guarantee. An attacker who can intercept the TLS connection triggers the downgrade...