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

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...

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...

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-2026-54430

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...

BIT-ENVOY-2026-47775 Envoy OAuth2 Filter: Padding Oracle via AES-256-CBC Cookie Decryption

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, the OAuth2 HTTP filter's encrypt/decrypt functions use AES-256-CBC without an authentication tag no HMAC, no AEAD. The /callback endpoint returns HTTP 302 on...

GHSA-F2CX-463Q-7M2C OpenAM OAuth Client Impersonation via JWKS Resolver Cache

Summary Description An Improper Authentication CWE-287 issue in OpenAM's OAuth2 privatekeyjwt client authentication path allows any registered OAuth2 client to mint tokens in the name of any other client whose key is published via a jwksuri, without knowing the victim's signing key. This affects...

CVE-2026-48090

Envoy CVE-2026-48090 affects the HTTP OAuth2 filter (envoy.filters.http.oauth2) in 1.37.0–1.37.5 and 1.38.3. A late AsyncClient completion can call OAuth2Filter methods after the downstream stream has been torn down, leading to undefined behavior, worker crashes, and use-after-free/invalid-vptr f...

CVE-2026-47775 Envoy OAuth2 Filter: Padding Oracle via AES-256-CBC Cookie Decryption

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, the OAuth2 HTTP filter's encrypt/decrypt functions use AES-256-CBC without an authentication tag no HMAC, no AEAD. The /callback endpoint returns HTTP 302 on...

CVE-2026-47775

Envoy OAuth2 filter vulnerability (CVE-2026-47775): prior to versions 1.35.11, 1.36.7, 1.37.3, and 1.38.1, the encrypt()/decrypt() path uses AES-256-CBC without an authentication tag (no HMAC/AEAD), enabling a padding oracle via the /callback endpoint. An attacker with the encrypted CodeVerifier ...

CVE-2026-47775

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, the OAuth2 HTTP filter's encrypt/decrypt functions use AES-256-CBC without an authentication tag no HMAC, no AEAD. The /callback endpoint returns HTTP 302 on...

PT-2026-52895

Name of the Vulnerable Software and Affected Versions Envoy versions 1.37.0 through 1.37.4 Envoy versions 1.38.0 through 1.38.2 Description 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....

GO-2026-5559 OAuth2 Proxy has an Authentication Bypass via Fragment Confusion in skip_auth_routes and skip_auth_regex in github.com/oauth2-proxy/oauth2-proxy

OAuth2 Proxy has an Authentication Bypass via Fragment Confusion in skipauthroutes and skipauthregex in github.com/oauth2-proxy/oauth2-proxy...

GO-2026-5314 OAuth2 Proxy has an Authorization Bypass in Email Domain Validation via Malformed Multi-@ Email Claims in github.com/oauth2-proxy/oauth2-proxy

OAuth2 Proxy has an Authorization Bypass in Email Domain Validation via Malformed Multi-@ Email Claims in github.com/oauth2-proxy/oauth2-proxy...

GO-2026-5236 OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing in github.com/oauth2-proxy/oauth2-proxy

OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing in github.com/oauth2-proxy/oauth2-proxy...