Improper Verification of Cryptographic Signature Affecting airflow-2-compat package, versions <2.11.2-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.06% (20th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-AIRFLOW2COMPAT-15691109
  • published19 Mar 2026
  • disclosed16 Mar 2026

Introduced: 16 Mar 2026

NewCVE-2026-27962  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade Minimos:latest airflow-2-compat to version 2.11.2-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream airflow-2-compat package and not the airflow-2-compat package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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 pass signature verification. When key=None is passed to any JWS deserialization function, the library extracts and uses the cryptographic key embedded in the attacker-controlled JWT jwk header field. An attacker can sign a token with their own private key, embed the matching public key in the header, and have the server accept the forged token as cryptographically valid — bypassing authentication and authorization entirely. This issue has been patched in version 1.6.9.

CVSS Base Scores

version 3.1