Synapse allows unsupported content types to lead to memory exhaustion

ImpactIn Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. PatchesSynapse 1.120.1 resolves the issue by denying...

PYSEC-2026-1613 Synapse allows unsupported content types to lead to memory exhaustion

Impact In Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. Patches Synapse 1.120.1 resolves the issue by denying...

twisted.web has disordered HTTP pipeline response

SummaryThe HTTP 1.0 and 1.1 server provided by twisted.web could process pipelined HTTP requests out-of-order, possibly resulting in information disclosure. PoC0. Start a fresh Debian container:shdocker run --workdir /repro --rm -it debian:bookworm-slim1. Install twisted and its dependencies:shap...

New API is vulnerable to CSRF through user email binding

Summary The email and WeChat account binding endpoints used GET requests for state-changing account operations. In deployments where session cookies could be sent on cross-site navigations, an attacker could trigger a logged-in user's browser to bind an attacker-controlled email address or OAuth...

PYSEC-2026-1102 aiohttp Cross-site Scripting vulnerability on index pages for static file handling

Summary A XSS vulnerability exists on index pages for static file handling. Details When using web.static..., showindex=True, the resulting index pages do not escape file names. If users can upload files with arbitrary filenames to the static directory, the server is vulnerable to XSS attacks...

kiwitcms vulnerable to stored cross-site scripting via unrestricted file upload

ImpactKiwi TCMS allows users to upload attachments to test plans, test cases, etc. Earlier versions of Kiwi TCMS had introduced upload validators in order to prevent potentially dangerous files from being uploaded and Content-Security-Policy definition to prevent cross-site-scripting attacks. The...

PYSEC-2026-1495 kiwitcms vulnerable to stored cross-site scripting via unrestricted file upload

Impact Kiwi TCMS allows users to upload attachments to test plans, test cases, etc. Earlier versions of Kiwi TCMS had introduced upload validators in order to prevent potentially dangerous files from being uploaded and Content-Security-Policy definition to prevent cross-site-scripting attacks. Th...

PYSEC-2026-1380 Flask-AppBuilder Has No Rate Limiting on Login AUTH DB

Impact Lack of rate limiting will allow an attacker to brute-force user credentials. Patches Ability to enable rate limiting on Flask-AppBuilder = 4.3.0. Use AUTHRATELIMITED = True and RATELIMITENABLED = True set the limit itself by using AUTHRATELIMIT. Will apply only to database authentication...

Claude Code’s hidden tracker was an “experiment,” says Anthropic

As a developer, you want to use tools you can trust and rely on. One researcher took that idea seriously enough to scrutinize their local Claude Code 2.1.196 installation. For developers using AI assistants with access to their code, files, and terminal, understanding what those tools are doing...

Security-Writeups

🔐 Security Writeups Welcome! This repository contains my pers...

CVE-2026-53646 FOSSBilling: Client password reset token reuse allows persistent account takeover

FOSSBilling is a free, open-source billing and client management system. In versions 0.5.6 through 0.7.2, when a ClientPasswordReset record already exists for a client from a previous unexpired reset request, subsequent calls to the resetpassword guest API endpoint reuse the existing token instea...

CVE-2026-53645 FOSSBilling's missing self-edit prevention in staff permission management allows persistent privilege escalation

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow a low-privileged staff account to grant arbitrary module permissions to itself through the admin API, resulting in persistent privilege escalation. A staff user that only has...

CVE-2026-53644

FOSSBilling is a free, open-source billing and client management system. Versions 0.5.3 through 0.7.2 allow authenticated clients to both read and reset API key service secrets for orders that are no longer in an active state e.g., suspended, canceled. The root cause is missing order-state...

CVE-2026-53644 FOSSBilling's missing order-state validation allows clients to read and reset API key secrets for non-active orders

FOSSBilling is a free, open-source billing and client management system. Versions 0.5.3 through 0.7.2 allow authenticated clients to both read and reset API key service secrets for orders that are no longer in an active state e.g., suspended, canceled. The root cause is missing order-state...

CVE-2026-53644 FOSSBilling's missing order-state validation allows clients to read and reset API key secrets for non-active orders

FOSSBilling is a free, open-source billing and client management system. Versions 0.5.3 through 0.7.2 allow authenticated clients to both read and reset API key service secrets for orders that are no longer in an active state e.g., suspended, canceled. The root cause is missing order-state...

EUVD-2026-41968

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 allow low-privileged staff accounts to perform unauthorized actions via admin API endpoints. The root cause is a combination of the canalwaysaccess module flag which grants all staff access to certain...

CVE-2026-53640

CVE-2026-53640 (FOSSBilling) affects the FOSSBilling project prior to version 0.8.0, where low-privileged staff could read sensitive data via admin API endpoints that lack proper authorization checks on read operations. The issue contrasts with write endpoints that have fine-grained permissions, ...

EUVD-2026-41961

FOSSBilling is a free, open-source billing and client management system. Versions 0.6.10 through 0.7.2 have a PHP code injection vulnerability in FOSSBilling's Config::prettyPrintArrayToPHP method. When configuration values are updated, string values are written into config.php without escaping...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the CreateTarFromZip process. An attacker can exhaust system memory and cause a service outage by uploading a zip file containing many highly compressible entries, resulting in...

Threat Actors Probe Gitea Docker Flaw CVE-2026-20896 13 Days After Disclosure

Threat actors have been observed attempting to exploit a recently patched critical security flaw in Gitea Docker images, according to Sysdig. The vulnerability in question is CVE-2026-20896 CVSS score: 9.8, a vulnerability that stems from the DevOps platform trusting the "X-WEBAUTH-USER" header...