CVE-2026-114616
HIGH
7,4
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: none
Description
AI Translation Available
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.
287
Improper Authentication
DraftCommon Consequences
Security Scopes Affected:
Integrity
Confidentiality
Availability
Access Control
Potential Impacts:
Read Application Data
Gain Privileges Or Assume Identity
Execute Unauthorized Code Or Commands
Applicable Platforms
Technologies:
Not Technology-Specific, Web Based, ICS/OT
326
Inadequate Encryption Strength
DraftCommon Consequences
Security Scopes Affected:
Access Control
Confidentiality
Potential Impacts:
Bypass Protection Mechanism
Read Application Data
Applicable Platforms
All platforms may be affected
1391
Use of Weak Credentials
IncompleteCommon Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism
Applicable Platforms
Technologies:
ICS/OT, Not Technology-Specific
https://github.com/authlib/authlib/commit/4ff30db442c70e29486e1982cb0ad37c037f5…
https://github.com/authlib/authlib/releases/tag/v1.9.1
https://github.com/authlib/authlib/security/advisories/GHSA-8m4g-j4wp-wgcg