CVE-2025-61920 Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.5, Authlib’s JOSE implementation accepts unbounded JWS/JWT header and signature segments. A remote attacker can craft a token whose base64url‑encoded header or signature spans hundreds of megabytes...

CVE-2025-59420

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.4, Authlib’s JWS verification accepts tokens that declare unknown critical header parameters crit, violating RFC 7515 “must‑understand” semantics. An attacker can craft a signed token with a critical...

UBUNTU-CVE-2025-59420

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.4, Authlib’s JWS verification accepts tokens that declare unknown critical header parameters crit, violating RFC 7515 “must‑understand” semantics. An attacker can craft a signed token with a critical...

CVE-2025-59420 Authlib: JWS/JWT accepts unknown crit headers (RFC violation → possible authz bypass)

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.4, Authlib’s JWS verification accepts tokens that declare unknown critical header parameters crit, violating RFC 7515 “must‑understand” semantics. An attacker can craft a signed token with a critical...

Authlib: JWS/JWT accepts unknown crit headers (RFC violation → possible authz bypass)

Summary Authlib’s JWS verification accepts tokens that declare unknown critical header parameters crit, violating RFC 7515 “must‑understand” semantics. An attacker can craft a signed token with a critical header for example, bork or cnf that strict verifiers reject but Authlib accepts. In...

GHSA-9GGR-2464-2J32 Authlib: JWS/JWT accepts unknown crit headers (RFC violation → possible authz bypass)

Summary Authlib’s JWS verification accepts tokens that declare unknown critical header parameters crit, violating RFC 7515 “must‑understand” semantics. An attacker can craft a signed token with a critical header for example, bork or cnf that strict verifiers reject but Authlib accepts. In...

Authlib 安全漏洞

Authlib is the ultimate Python library for building OAuth and OpenID Connect servers open-sourced by Authlib. A security vulnerability exists in Authlib versions prior to 1.6.4, which stems from JWS authentication accepting tokens declaring unknown key header parameters, which could lead to polic...

PT-2025-38752

Name of the Vulnerable Software and Affected Versions Authlib versions prior to 1.6.4 Description Authlib’s JWS verification improperly handles tokens declaring unknown critical header parameters crit, violating RFC 7515 specifications. An attacker can create a signed token with a critical header...

Inadequate Encryption Strength

Overview Affected versions of this package are vulnerable to Inadequate Encryption Strength due to the HMAC and RSA key lengths used in the JSON Web Signature JWS implementation not meeting recommended security standards. Remediation Upgrade pyjwt to version 2.11.0 or higher. References - GitHub...

Inadequate Encryption Strength

Overview Affected versions of this package are vulnerable to Inadequate Encryption Strength due to the HMAC and RSA key lengths used in the JSON Web Signature JWS implementation not meeting recommended security standards. Remediation Upgrade firebase/php-jwt to version 7.0.0 or higher. References...

The vulnerability of the implementation package for the JWE, JWS, and JWT go-jose standards in the Go programming language lies in its uncontrolled resource consumption, allowing attackers to cause service failures.

The vulnerability of the implementation package for the JWE, JWS, and JWT go-jose standards in the Go programming language is related to an uncontrolled resource consumption. Exploiting this vulnerability could allow a malicious actor to cause service failures...

CVE-2023-23928

reason-jose is a JOSE implementation in ReasonML and OCaml.Jose.Jws.validate does not check HS256 signatures. This allows tampering of JWS header and payload data if the service does not perform additional checks. Such tampering could expose applications using reason-jose to authorization bypass...

SUSE CVE-2025-3757

Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification...

UBUNTU-CVE-2025-3757

Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification...

Authentication Bypass by Primary Weakness

Overview Affected versions of this package are vulnerable to Authentication Bypass by Primary Weakness due to the improper handling of JWS signature verification. An attacker can gain unauthorized access by submitting a specially crafted JWS that bypasses the signature check. This is only...

go-jose: Go JOSE's Parsing Vulnerable to Denial of Service

A flaw was found in GO-JOSE. In affected versions, when parsing compact JWS or JWE input, Go JOSE could use excessive memory. The code uses strings.Splittoken, "." to split JWT tokens, which is vulnerable to excessive memory consumption when processing maliciously crafted tokens with a large numb...

OpenPubkey 安全漏洞

OpenPubkey is an OpenPubkey reference implementation of OpenPubkey open source. A security vulnerability exists in OpenPubkey versions prior to 0.10.0 and OPKSSH versions prior to 0.5.0, which stems from a specially crafted JWS that can bypass signature verification and may result in bypassing...

OpenPubkey 安全漏洞

OpenPubkey is an OpenPubkey reference implementation of OpenPubkey open source. A security vulnerability exists in OpenPubkey versions prior to 0.10.0, which stems from a specially crafted JWS that can bypass signature verification...

PT-2025-20927 · Unknown · Openpubkey

Name of the Vulnerable Software and Affected Versions: OpenPubkey versions prior to 0.10.0 Description: The issue allows a specially crafted JWS to bypass signature verification. Recommendations: For versions prior to 0.10.0, update to version 0.10.0 or later to resolve the issue. As a temporary...

Medium: containerd

Issue Overview: Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption JWE, JSON Web Signature JWS, and JSON Web Token JWT standards. In versions on the 4.x branch prior to version 4.0.5, when parsing...