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CVE-2026-114616

7.4 high Awaiting Analysis
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 3

  1. StatusPublished → Awaiting AnalysisNVD modified 2026-10-23 19:34
  2. StatusReceived → PublishedNVD modified 2026-10-22 21:14
  3. First seenCVSS 7.4NVD modified 2026-10-22 22:18

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3