CVE-2026-20896

CVE-2026-20896 Gitea의 공식 Docker 이미지1.26.2까지는 기본 설정으로 REVERSEPROXYTRUSTEDPROXIES = 를 포함하고 있습니다. 리버스 프록시 로그인을 활성화하면 와일드카드로 인해 모든 소스 IP가 신뢰되는 프록시로 간주되어, 해당 포트에 접근 가능한 누구나 X-WEBAUTH-USER 헤더를 보내 원하는 사용자로 로그인할 수 있습니다. 비밀번호나 토큰이 필요 없습니다. 이 문제를 Gitea에 보고했으며, 1.26.3 / 1.26.4에서 수정되었습니다. 이 저장소는 제가 직접 작성한 분석...

CVE-2026-20896

CVE-2026-20896: Gitea Docker 이미지 인증 우회 PoC !WARNING 이 PoC는 로컬 실습 환경 또는 명시적으로 테스트 권한을 부여받은 시스템에서만 사용하십시오. https://github.com/user-attachments/assets/b73af2fe-0e59-438b-80d6-be93fd75697b 개요 CVE-2026-20896 은 영향을 받는 공식 Gitea Docker 이미지의 인증 우회 취약점입니다. 리버스 프록시 인증이 활성화된 경우, 이미지에서 생성된...

CVE-2026-80199 Kimai before 2.54.0 Username Enumeration via Timing Oracle

Kimai before 2.54.0 contains a timing oracle vulnerability in TokenAuthenticator that allows unauthenticated attackers to enumerate valid usernames via X-AUTH-USER header. Attackers can measure response time differences when the password hasher runs only for existing users, enabling username...

CVE-2026-18972

An authenticated attacker can spoof another GUI user's identity by sending their request with the custom header "Grpc-Metadata-USER". This can lead to an account takeover attack from a user with low privileges to administrator...

CVE-2026-20896 — Updated!

CVE-2026-20896: Gitea Docker Image Authentication Bypass PoC !WARNING Use this PoC only in a local lab or against a system you are explicitly authorized to test. https://github.com/user-attachments/assets/b73af2fe-0e59-438b-80d6-be93fd75697b Overview CVE-2026-20896 is an authentication bypass in...

CVE-2026-49332

A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys X-Forwarded-User but does not strip underscore-variant keys XForwardedUser from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing a...

PT-2026-65683

Name of the Vulnerable Software and Affected Versions Cosmos-Server affected versions not specified Description An authentication bypass exists in the tokenMiddleware function within src/proxy/routerGen.go. The issue occurs when the Constellation-tunnel bypass branch is triggered, causing the...

Open WebUI: Terminal proxy forwards a spoofable, integrity-unbound user identity to the upstream (X-User-Id header and ws_terminal session_id query injection)

Summary The terminal proxy in backend/openwebui/routers/terminals.py forwards the Open WebUI user's identity to the upstream terminal server / backend coordinator as an authorization claim, with no cryptographic binding to the session that produced it. The forwarded identity is...

CVE-2026-59224

Open WebUI vulnerability CVE-2026-59224 affects versions prior to 0.10.0. The issue: in backend/open_webui/routers/terminals.py, the ws_terminal upstream URL is built from an unencoded session_id and appends user_id as a query parameter, enabling query injection to make the terminal backend resol...

Exploit for CVE-2026-20896

CVE-2026-20896 Gitea's official Docker image up to and inclu...

CVE-2026-20896 Gitea Docker image trusts spoofable reverse-proxy headers by default

Gitea Docker image versions up to and including 1.26.2 use REVERSEPROXYTRUSTEDPROXIES= by default, allowing any source IP to impersonate a user when reverse-proxy authentication headers such as X-WEBAUTH-USER are enabled...

CVE-2026-58399 @acastellon/auth has an authentication bypass via spoofable headers in validateToken()

@acastellon/auth is an authentication control system for microservices. Versions prior to 2.3.0 appear to allow an unauthenticated authentication bypass in validateToken through spoofable auth-user and Host request headers. The validateToken middleware contains a service-to-service bypass for...

CVE-2026-58399 @acastellon/auth has an authentication bypass via spoofable headers in validateToken()

@acastellon/auth is an authentication control system for microservices. Versions prior to 2.3.0 appear to allow an unauthenticated authentication bypass in validateToken through spoofable auth-user and Host request headers. The validateToken middleware contains a service-to-service bypass for...

EUVD-2026-41013

@acastellon/auth is an authentication control system for microservices. Versions prior to 2.3.0 appear to allow an unauthenticated authentication bypass in validateToken through spoofable auth-user and Host request headers. The validateToken middleware contains a service-to-service bypass for...

CVE-2026-58399

@acastellon/auth is an authentication control system for microservices. Versions prior to 2.3.0 appear to allow an unauthenticated authentication bypass in validateToken through spoofable auth-user and Host request headers. The validateToken middleware contains a service-to-service bypass for...

CVE-2026-58399

The CVE affects @acastellon/auth (authentication control for microservices). Versions

PT-2026-51429

Name of the Vulnerable Software and Affected Versions Gogs versions prior to 0.14.3 Description When ENABLE REVERSE PROXY AUTHENTICATION is enabled, Gogs accepts the configured authentication header default: X-WEBAUTH-USER directly from client requests without validating that the request originat...

@acastellon/auth: Authentication bypass via spoofable headers in validateToken()

@acastellon/auth v2.2.0 appears to allow an unauthenticated authentication bypass in validateToken through spoofable auth-user and Host request headers. The validateToken middleware contains a service-to-service bypass for auth-user: service-brother when req.get'host'.startsWithgetHostName. Both...

User Impersonation

Overview @acastellon/auth is an Authorization Filtering for NodeJS Express Application NTLM + LDAP + JWT + AWS Cognito + Azure AD/Entra ID + OIDC providers + SAML + env var secrets Affected versions of this package are vulnerable to User Impersonation via the validateToken process. An attacker ca...

CVE-2026-41726 In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header

When an application opts into DelegatingDeserializer, a producer can grow the consumer's heap without bound by sending records with unique random spring.kafka.serialization.selector header values, eventually causing GC thrash and OutOfMemoryError. Affected versions: Spring for Apache Kafka 4.0.0...