ROOT-APP-PYPI-CVE-2026-27962 CVE-2026-27962 in Authlib - Patched by Root

Root has patched CVE-2026-27962 in the Authlib package for Root:PyPI. Multiple fixed versions available...

[SECURITY] [DLA 4708-1] python-authlib security update

------------------------------------------------------------------------- Debian LTS Advisory DLA-4708-1 [email protected] https://www.debian.org/lts/security/ Andrej Shadura July 31, 2026 https://wiki.debian.org/LTS -...

Debian dla-4708 : python-authlib-doc - security update

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4708 advisory. - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4708-1 [email protected]...

Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : Authlib vulnerabilities (USN-8557-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8557-1 advisory. Jay Neiva and Mauro Carrillo discovered that Authlib did not properly validate cryptographic keys embedded in JWT headers. An...

USN-8557-1: Authlib vulnerabilities

Jay Neiva and Mauro Carrillo discovered that Authlib did not properly validate cryptographic keys embedded in JWT headers. An attacker could possibly use this issue to forge trusted tokens, resulting in authentication and authorization bypass. CVE-2026-27962 Jay Neiva and Mauro Carrillo discovere...

SUSE SLED15 / SLES15 Security Update : python-Authlib (SUSE-SU-2026:2968-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2968-1 advisory. This update for python-Authlib fixes the following issues - CVE-2026-41425: Prior to 1.6.11, there is no CSRF...

Security update for python-Authlib

This update for python-Authlib fixes the following issues CVE-2026-41425: no CSRF protection on the cache feature in authlib.integrations.starletteclient.OAuth bsc1263114. CVE-2026-44681: unauthenticated open redirect in the OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoints...

PYSEC-2026-1201 Authlib has 1-click Account Takeover vulnerability

Security Advisory: Cache-Backed State Storage CSRF in Authlib The Security Labs team at Snyk has reported a security issue affecting Authlib, identified during a recent research project. The Snyk Security Labs team has identified a vulnerability that can result in a one-click account takeover in...

Authlib has 1-click Account Takeover vulnerability

Security Advisory: Cache-Backed State Storage CSRF in AuthlibThe Security Labs team at Snyk has reported a security issue affecting Authlib, identified during a recent research project.The Snyk Security Labs team has identified a vulnerability that can result in a one-click account takeover in...

Authlib : JWE zip=DEF decompression bomb enables DoS

SummaryAuthlib’s JWE zip=DEF path performs unbounded DEFLATE decompression. A very small ciphertext can expand into tens or hundreds of megabytes on decrypt, allowing an attacker who can supply decryptable tokens to exhaust memory and CPU and cause denial of service. Details- Affected component:...

PYSEC-2026-1202 Authlib : JWE zip=DEF decompression bomb enables DoS

Summary Authlib’s JWE zip=DEF path performs unbounded DEFLATE decompression. A very small ciphertext can expand into tens or hundreds of megabytes on decrypt, allowing an attacker who can supply decryptable tokens to exhaust memory and CPU and cause denial of service. Details - Affected component...

Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

SummaryAuthlib’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. During verification, Authlib decodes and parses the full input before it is rejected, driving...

PYSEC-2026-1203 Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Summary 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. During verification, Authlib decodes and parses the full input before it is rejected, driving...

PYSEC-2026-1200 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: JWS/JWT accepts unknown crit headers (RFC violation → possible authz bypass)

SummaryAuthlib’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...

CVE-2026-49852

creationtimestamp| type| source ---|---|--- 2026-07-02 20:35:04+00:00| published-proof-of-concept| https://github.com/authlib/joserfc/security/advisories/GHSA-gg9x-qcx2-xmrh 2026-07-17 22:08:26+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mqur7v4av42e...

Authlib JWS JWK Header Injection: Signature Verification Bypass

Description SummaryA JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticatedattacker to forge arbitrary JWT tokens that pass signature verification. When key=None is passedto any JWS deserialization function, the library extracts and uses the cryptographic key...

PYSEC-2026-287 Authlib JWS JWK Header Injection: Signature Verification Bypass

Description Summary A JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticated attacker to forge arbitrary JWT tokens that pass signature verification. When key=None is passed to any JWS deserialization function, the library extracts and uses the cryptographic...

Linux Distros Unpatched Vulnerability : CVE-2026-41479

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 1.6.10 and 1.7.1, Authlib's OAuth 2.0 authorization endpoint can be turned...

CVE-2026-41479

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.10 and 1.7.1, Authlib's OAuth 2.0 authorization endpoint can be turned into an unauthenticated open redirect when a request uses an unsupported responsetype and supplies an attacker-controlled redirecturi. The...