CVE-2026-114616
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.1, Authlib's OctKey.import_key() and HMAC signing an
CVSS
7.4
Alto
EPSS
0.2%
p11
KEV
—
Exploit Today
3
0-100
Publicado: 22 oct 2026 · Última mod.: 23 oct 2026 · CWE-287 · CWE-326 · CWE-1391
Sin historial EPSS suficiente todavía.
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.1, Authlib's OctKey.import_key() and HMAC signing and verification path accept zero-length key material. If an application's secret lookup can return an empty string or empty bytes, a remote attacker can compute the deterministic HS256, HS384, or HS512 signature for arbitrary token claims and have Authlib treat the token as authentic. This issue is fixed in version 1.9.1.