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authlib has 21 CVEs on record between 2025 and 2026. Disclosure cadence is accelerating: 12 in the last 90 days against 1 in the 90 before. The busiest recent month was October 2026 with 10. The median CVSS is 7.4 (high), with 6 rated critical. None have a confirmed exploitation report. The most common weakness class is CWE-347 (6). Most affected products: authlib (20), joserfc (1).

CVEs per month

Last 12 months, by publish date

111201020304050607080910
Exploited share
0% vs 1% corpus
Median CVSS
7.4
Publish → KEV
—
Last 90 days
12 prev 1

Products

  • authlib 20
  • joserfc 1
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21
Total CVEs
6
Critical
0
CISA KEV
0
Exploited

Worst active — by depth score

authlib vulnerabilities

CVEs affecting authlib, newest first. Open any entry for full detail, references, and exploit status.

21 CVEsRSS

CVE-2026-116672High· 8.8
yesterday

Authlib RFC 7592 examples omit registration-access-token client binding

Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.15 until 1.9.1, the documented ClientConfigurationEndpoint.authenticate_client and ClientConfigurationEndpoint.check_permission reference implementations l…

▾ Twilightauthlib · authlibvia CVEORG
CVE-2026-114620Medium· 5.4
yesterday

Authlib: Unvalidated request_uri fetch in JWT-secured authorization request (JAR) leading to SSRF

Authlib: Unvalidated request_uri fetch in JWT-secured authorization request (JAR) leading to SSRF

▾ Sunlitauthlib · authlibEPSS 0.29%via OSV
CVE-2026-114619Medium· 4.6
yesterday

Authlib: OpenID implicit grant checks raw scope instead of allowed scope before issuing ID tokens

Authlib: OpenID implicit grant checks raw scope instead of allowed scope before issuing ID tokens

▾ Sunlitauthlib · authlibEPSS 0.16%via OSV
CVE-2026-114618Medium· 6.8
yesterday

Authlib: Default JWT bearer grant accepts assertions for the wrong audience

Authlib: Default JWT bearer grant accepts assertions for the wrong audience

▾ Sunlitauthlib · authlibEPSS 0.22%via OSV
CVE-2026-114617Medium· 4.2⚖ disputed
yesterday

Authlib: ID token can disable its own nonce validation via the nonce_supported claim

Authlib: ID token can disable its own nonce validation via the nonce_supported claim

▾ Sunlitauthlib · authlibEPSS 0.23%via OSV
CVE-2026-114616High· 7.4
yesterday

Authlib accepts an empty HMAC key, allowing JWS/JWT signature forgery (HS256/HS384/HS512)

Authlib accepts an empty HMAC key, allowing JWS/JWT signature forgery (HS256/HS384/HS512)

▾ Twilightauthlib · authlibEPSS 0.21%via OSV
CVE-2026-114615High· 7.4
yesterday

Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys

Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys

▾ Twilightauthlib · authlibEPSS 0.13%via OSV
CVE-2026-114614Low· 2.6
yesterday

Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback…

Authlib: is_secure_transport() loopback exemption can be bypassed with a userinfo component, allowing cleartext-HTTP URLs to non-loopback hosts

▾ Sunlitauthlib · authlibEPSS 0.18%via OSV
CVE-2026-102946Critical· 9.1PoC
1w ago

joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards

joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.7.4, joserfc.jws.deserialize_json() accepts a JWS General JSON Serialization with an empty signatures …

▾ Abyssalauthlib · joserfcEPSS 0.12%via NVD
CVE-2026-104056Critical· 9.8PoC⚖ disputed
3w ago

Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding

Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controll…

▾ AbyssalAuthlib · AuthlibEPSS 0.20%via NVD
GHSA-6m87-8wg6-hh8wCritical· 9.8
1mo ago

Duplicate Advisory: Authlib: empty signatures validation in JWS JSON deserialization

Duplicate Advisory: Authlib: empty signatures validation in JWS JSON deserialization

▾ Midnightauthlib · authlibvia GHSA
CVE-2026-96760Critical· 9.8PoC⚖ disputed
1mo ago

Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability

Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking f…

▾ AbyssalAuthlib · AuthlibEPSS 0.38%via NVD
CVE-2026-41479Medium· 5.4
4mo ago

Authlib OAuth 2.0 has Open Redirect in Authorization API that allows attacker-controlled redirect_uri through unsupported response_type

Authlib OAuth 2.0 has Open Redirect in Authorization API that allows attacker-controlled redirect_uri through unsupported response_type

▾ Sunlitauthlib · authlibEPSS 0.26%via GHSA
CVE-2026-41425Medium· 5.4
6mo ago

Authlib: Cross-site request forging when using cache

Authlib: Cross-site request forging when using cache

▾ Sunlitauthlib · authlibEPSS 0.11%via OSV
CVE-2026-28490High
7mo ago

Authlib Vulnerable to JWE RSA1_5 Bleichenbacher Padding Oracle

Authlib Vulnerable to JWE RSA1_5 Bleichenbacher Padding Oracle

▾ Twilightauthlib · authlibEPSS 0.14%via OSV
CVE-2026-28498High· 7.5PoC
7mo ago

Authlib is a Python library which builds OAuth and OpenID Connect servers

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a library-level vulnerability was identified in the Authlib Python library concerning the validation of OpenID Connect (OIDC) ID Tokens. S…

▾ Midnightauthlib · authlibEPSS 0.24%via NVD
CVE-2026-27962Critical· 9.1PoC
7mo ago

Authlib is a Python library which builds OAuth and OpenID Connect servers

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a JWK Header Injection vulnerability in authlib's JWS implementation allows an unauthenticated attacker to forge arbitrary JWT tokens that…

▾ Abyssalauthlib · authlibEPSS 0.56%via NVD
CVE-2026-28802Critical· 9.8⚖ disputed
7mo ago

Authlib is a Python library which builds OAuth and OpenID Connect servers

Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature…

▾ Midnightauthlib · authlibEPSS 0.50%via NVD
CVE-2025-68158Medium· 5.7
9mo ago

Authlib is a Python library which builds OAuth and OpenID Connect servers

Authlib is a Python library which builds OAuth and OpenID Connect servers. In versions 1.0.0 through 1.6.5, cache-backed state/request-token storage is not tied to the initiating user session, so CSRF is possible for any attacker that ha…

▾ Sunlitauthlib · authlibEPSS 0.27%via NVD
CVE-2025-61920High· 7.5
1y ago

Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

Authlib is vulnerable to Denial of Service via Oversized JOSE Segments

▾ Twilightauthlib · authlibEPSS 0.64%via OSV
CVE-2025-62706Medium· 6.5
1y ago

Authlib : JWE zip=DEF decompression bomb enables DoS

Authlib : JWE zip=DEF decompression bomb enables DoS

▾ Sunlitauthlib · authlibEPSS 0.46%via OSV
authlib vulnerabilities (CVEs) · VulnSea