CVE-2026-73309

CVE-2026-73309: Empty OAuth2 credentials bypass XenForo before 2.3.13 can skip OAuth2 client-secret and PKCE verification when an empty string reaches the token endpoint. What happens The endpoint checks whether clientsecret and codeverifier keys exist, then performs the comparisons only when the...

CVE-2026-3456-OAuth2-PKCE-Race-Condition-Account-Takeover-

8. CVE-2026-3456 – OAuth2 PKCE Race Condition Account Takeover Overview A race condition in the OAuth2 authorization server allows an attacker to reuse a victim’s authorization code before the legitimate client redeems it, by guessing or brute‑forcing the PKCE codeverifier within a small time...

SUSE CVE-2026-26247

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check...

CVE-2026-8590 Spotfire OAuth2 PKCE Bypass for public clients

Vulnerability in Spotfire Spotfire Enterprise Spotfire Server modules, Spotfire Spotfire Enterprise with External Consumers Spotfire Server modules, Spotfire Spotfire on Kubernetes Spotfire Server modules. This issue affects Spotfire Enterprise: through 14.0.12, through 14.4.2, through 14.5.0,...

GHSA-M5CH-PPFX-XV3V Gitea OAuth2 PKCE S256 verifier bypass

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check...

Gitea OAuth2 PKCE S256 verifier bypass

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check...

CVE-2026-26247

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check...

CVE-2026-26247: Improper Access Control

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check...

EUVD-2023-3295

Malicious code in bioql PyPI...

CVE-2023-50714

yii2-authclient is an extension that adds OpenID, OAuth, OAuth2 and OpenId Connect consumers for the Yii framework 2.0. In yii2-authclient prior to version 2.2.15, the Oauth2 PKCE implementation is vulnerable in 2 ways. First, the authCodeVerifier should be removed after usage similar to authStat...

CVE-2023-50714: Server-Side Request Forgery (SSRF)

yii2-authclient is an extension that adds OpenID, OAuth, OAuth2 and OpenId Connect consumers for the Yii framework 2.0. In yii2-authclient prior to version 2.2.15, the Oauth2 PKCE implementation is vulnerable in 2 ways. First, the authCodeVerifier should be removed after usage similar to authStat...