Gitea OAuth2 authorization codes can be reused after expiry

Gitea versions before 1.25.5 do not consistently enforce OAuth2 authorization code expiry and single-use behavior during token exchange...

GHSA-5V69-G2M3-3HQ3 Gitea OAuth2 authorization codes can be reused after expiry

Gitea versions before 1.25.5 do not consistently enforce OAuth2 authorization code expiry and single-use behavior during token exchange...

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...

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-2026-26232

Gitea versions before 1.25.5 are vulnerable to a Replay Attack due to the improper enforcement of OAuth2 authorization code expiry and single-use behavior during the token exchange process. An attacker can exploit this by reusing valid authorization codes to gain unauthorized access. Affected com...

CVE-2026-14612

Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may b...

CVE-2026-14612

Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may b...

UBUNTU-CVE-2026-14612

Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may b...

CVE-2026-14612 Freeipa: ipa: idm: freeipa: off-by-one buffer overflows in ipa-otpd oauth2.c during oauth2 device authorization

Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may b...

CVE-2026-14612

Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may b...

EUVD-2026-41554

Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may b...

CVE-2026-54431

A flaw was found in liboauth2. The Demonstrating Proof-of-Possession DPoP verifier incorrectly accepts a malformed DPoP proof. This proof contains private key material in its JSON Web Key JWK header, which should be rejected according to RFC 9449. This vulnerability could allow an attacker to...

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...

CVE-2026-28699: Improper Access Control

Gitea versions up to and including 1.26.1 allow OAuth2 access token scope enforcement to be bypassed through HTTP Basic authentication...

PT-2026-55548

Name of the Vulnerable Software and Affected Versions FreeIPA ipa-otpd daemon affected versions not specified Description Two off-by-one errors exist in the OAuth2 device authorization handler of the ipa-otpd daemon. These errors can lead to out-of-bounds memory access when the daemon processes a...

CVE-2026-26232: Authentication Bypass by Capture-replay

Gitea versions before 1.25.5 do not consistently enforce OAuth2 authorization code expiry and single-use behavior during token exchange...

CVE-2026-14612: Out-of-bounds Write

Two off-by-one errors in the FreeIPA ipa-otpd daemon's OAuth2 device authorization handler can cause out-of-bounds memory access when processing an oversized response from a configured external OAuth2/OIDC Identity Provider. An attacker who controls or can man-in-the-middle the IdP endpoint may b...

CVE-2026-54430

liboauth2 is vulnerable to Server-Side Request Forgery in oauth2josejwksawsalbresolve function. The AWS ALB verifier reads both signer and kid from the unverified JWT header. If signer matches the configured ARN, kid is appended to albbaseurl without URL encoding or path sanitization, and the HTT...

CVE-2026-54430

liboauth2 is vulnerable to Server-Side Request Forgery in oauth2josejwksawsalbresolve function. The AWS ALB verifier reads both signer and kid from the unverified JWT header. If signer matches the configured ARN, kid is appended to albbaseurl without URL encoding or path sanitization, and the HTT...

BIT-ENVOY-2026-48090 Envoy HTTP: OAuth2 filter late async token completion after stream teardown (UAF / crash risk)

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, the HTTP OAuth2 filter envoy.filters.http.oauth2 can leave an in-flight async token exchange attached to a downstream stream that has already been torn down. A late...