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CVE-2026-27962Authlib JWS JWK Header Injection: Signature Verification Bypass

authlib authlib; Red Hat Red Hat Quay 3.10; Red Hat Red Hat Quay 3.14; Red Hat Red Hat Quay 3.15 Yayım: (7 ay önce)

Açıklama

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.

Zayıflık türü (CWE): CWE-347

Veri: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Bilgiler kaynaktaki haliyle, İngilizce yayımlanır.

Etkilenen ürünler ve sürümler

ÜreticiÜrünSürümler
authlib authlib < 1.6.9
quay 3.10 —
quay 3.14 —
quay 3.15 —
quay 3.16 —
quay 3.18 —
Red Hat Lightspeed Core —
Red Hat Red Hat Ansible Automation Platform 2 —
Red Hat Red Hat OpenShift AI (RHOAI) —
Red Hat Red Hat Quay 3.10 all versions
Red Hat Red Hat Quay 3.14 all versions
Red Hat Red Hat Quay 3.15 all versions
Red Hat Red Hat Quay 3.16 all versions
Red Hat Red Hat Quay 3.18 all versions
Red Hat Red Hat Satellite 6 —

Kaynaklar ve yamalar

CPE eşleşmeleri (NVD) (1)
  • cpe:2.3:a:authlib:authlib:*:*:*:*:*:*:*:* < 1.6.9