CVE-2026-18165

@fastify/oauth2 is an OAuth 2.0 plugin for Fastify. In versions from 7.2.0 up to but not including 8.3.0, the plugin validates the OAuth state, and with PKCE the code verifier, by comparing the callback query parameter against an unprefixed, predictable cookie, with no server-side binding to the...

CVE-2026-18165

@fastify/oauth2 is an OAuth 2.0 plugin for Fastify. In versions from 7.2.0 up to but not including 8.3.0, the plugin validates the OAuth state, and with PKCE the code verifier, by comparing the callback query parameter against an unprefixed, predictable cookie, with no server-side binding to the...

CVE-2026-58489

HedgeDoc prior to v1.11.0 is vulnerable to a CSRF-like flaw in the GitHub Gist export callback. The OAuth2 state value was only checked for presence, not validated against the user session, allowing an attacker to craft a callback URL with their own valid GitHub OAuth code. When a logged-in victi...

GO-2026-4586 OliveTin has unauthenticated DoS via concurrent map writes in OAuth2 state handling in github.com/OliveTin/OliveTin

OliveTin has unauthenticated DoS via concurrent map writes in OAuth2 state handling in github.com/OliveTin/OliveTin. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive...

GHSA-45M3-398W-M2M9 OliveTin has unauthenticated DoS via concurrent map writes in OAuth2 state handling

Summary An unauthenticated denial-of-service vulnerability exists in OliveTin’s OAuth2 login flow. Concurrent requests to /oauth/login can trigger unsynchronized access to a shared registeredStates map, causing a Go runtime panic fatal error: concurrent map writes and process termination. This...

EUVD-2023-2056

Malicious code in bioql PyPI...

GHSA-G8X5-P9QC-CF95 @fastify/oauth2 vulnerable to Cross Site Request Forgery due to reused Oauth2 state

Impact All versions of @fastify/oauth2 used a statically generated state parameter at startup time and were used across all requests for all users. The purpose of the Oauth2 state parameter is to prevent Cross-Site-Request-Forgery attacks. As such, it should be unique per user and should be...

GHSA-HGXV-3497-3HHJ Duplicate Advisory: @fastify/oauth2 Oauth2 state parameter reuse

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-g8x5-p9qc-cf95. This link is maintained to preserve external references. Original Description All versions of @fastify/oauth2 used a statically generated state parameter at startup time and were used across all...