PT-2025-55003

Уязвимость реализации JOSE библиотеки Authlib для серверов OAuth и OpenID Connect связана с недостаточной проверкой вводимых данных. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, вызвать отказ в обслуживании...

Linux Distros Unpatched Vulnerability : CVE-2025-59420

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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 unknow...

DEBIAN-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 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...

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...

aad-fastapi (>=1.0.0, <=1.1.2), aad-fastapi-dl37 (>=1.0.0, <=1.0.3) +226 more potentially affected by CVE-2025-59420 via authlib (>=0.10.0, <=1.6.3)

authlib PYPI version =0.10.0, =1.0.0, =1.0.0, =0.0.1, =1.0.2, =1.0.2, =0.4.0rc1, =0.1.0, =1.3.0a20250904, =1.2.0a20250730, =1.2.0a20250730, =0.0.0, =1.2.0, =0.0.1, =0.1.0, =0.2.1 and more Source cves: CVE-2025-59420 Source advisory: MEND:CVE-2025-59420...

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...

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 (Python) prior to 1.6.4 verifies JWS tokens with unknown critical header parameters (crit), violating RFC 7515 must-understand semantics. An attacker could craft a signed token that strict verifiers reject but Authlib accepts, enabling policy bypass, replay, or privilege escalation in mix...

aad-fastapi-dl37 (>=1.0.0, <=1.0.2), agentstack-cli (>=0.4.0rc1, <=0.4.3) +160 more potentially affected by CVE-2025-59420 via authlib (>=1.0.0b2, <=1.6.3)

authlib PYPI version =1.0.0b2, =1.0.0, =0.4.0rc1, =0.1.0, =1.3.0a20250904, =1.2.0a20250730, =1.2.0a20250730, =0.0.0, =1.7.0, =0.0.1, =0.1.0, =1.0.3, =2.0.0, =0.16.0, =0.33.0, =0.41.0 and more Source cves: CVE-2025-59420 Source advisory: OSV:GHSA-9GGR-2464-2J32...

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...

molten-jwt (0.3.0) potentially affected by CVE-2025-59420 via authlib (0.12.1)

authlib PYPI version 0.12.1 is affected by a known vulnerability. The following packages have a transitive dependency on authlib and may be impacted: - molten-jwt 0.3.0 Source cves: CVE-2025-59420 Source advisory: OSV:GHSA-9GGR-2464-2J32...

lumapps-sdk (>=1.0.0b13, <=1.0.0b18) potentially affected by CVE-2025-59420 via authlib (0.14.1)

authlib PYPI version 0.14.1 is affected by a known vulnerability. The following packages have a transitive dependency on authlib and may be impacted: - lumapps-sdk =1.0.0b13, =1.0.0b18 Source cves: CVE-2025-59420 Source advisory: OSV:GHSA-9GGR-2464-2J32...

authutils (5.0.3) potentially affected by CVE-2025-59420 via authlib (0.14.2)

authlib PYPI version 0.14.2 is affected by a known vulnerability. The following packages have a transitive dependency on authlib and may be impacted: - authutils 5.0.3 Source cves: CVE-2025-59420 Source advisory: OSV:GHSA-9GGR-2464-2J32...

authlib-gino (>=0.1.0, <=0.3.0), cnmcclient (0.4.3) +14 more potentially affected by CVE-2025-59420 via authlib (0.14.3)

authlib PYPI version 0.14.3 is affected by a known vulnerability. The following packages have a transitive dependency on authlib and may be impacted: - authlib-gino =0.1.0, =0.1.2, =0.4.0, =0.1.2, =1.0.0b7, =0.2.0, =1.0.0, =7.0.8.dev28841, =3.5.6.dev19088, =5.1.1.dev24106 and more Source cves:...

bastion-key-client (>=1.0.1, <=1.4.0), fabric-am-handlers (>=0.11.0, <=1.4.0b2) +5 more potentially affected by CVE-2025-59420 via authlib (0.15.2)

authlib PYPI version 0.15.2 is affected by a known vulnerability. The following packages have a transitive dependency on authlib and may be impacted: - bastion-key-client =1.0.1, =0.11.0, =0.14.0, =0.4.0, =0.9.0, =1.0.0b1, =1.0.0 Source cves: CVE-2025-59420 Source advisory: OSV:GHSA-9GGR-2464-2J3...

cumulusci (>=3.32.0, <=3.37.0.dev0), lumapps-sdk (>=1.1.3b5, <=2.0.3) +3 more potentially affected by CVE-2025-59420 via authlib (0.15.3)

authlib PYPI version 0.15.3 is affected by a known vulnerability. The following packages have a transitive dependency on authlib and may be impacted: - cumulusci =3.32.0, =1.1.3b5, =0.1.0, =0.53.1, =0.1.0, =0.1.9 Source cves: CVE-2025-59420 Source advisory: OSV:GHSA-9GGR-2464-2J32...