CVE-2026-28802

Katalog CVE

CVSS 9.8 · Critical EPSS 0,57%

Kerentanan Improper Verification of Cryptographic Signature pada authlib. Skor CVSS 3.1 9.8 (Critical) menurut NVD.

Deskripsi (NVD)

Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature verification step without any changes to the application code when a failure was expected.. This issue has been patched in version 1.6.7.

Rincian

Terbit di NVD

6 Maret 2026

Terakhir diubah

10 September 2026

Status NVD

Modified

CVSS 3.1

9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-347: Improper Verification of Cryptographic Signature

EPSS (30 hari)

0,57% peluang dieksploitasi; lebih tinggi dari 45,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/authlib/authlib/security/advisories/GHSA-7wc2-qxgw-g8gg exploit · advisory vendor
• https://github.com/authlib/authlib/commit/a61c2acb807496e67f32051b5f1b1d5ccf8f0a75 patch
• https://github.com/authlib/authlib/commit/b87c32ed07b8ae7f805873e1c9cafd1016761df7 patch
• https://access.redhat.com/errata/RHSA-2026:19375
• https://access.redhat.com/errata/RHSA-2026:4942
• https://access.redhat.com/errata/RHSA-2026:5168
• https://access.redhat.com/errata/RHSA-2026:5665
• https://access.redhat.com/errata/RHSA-2026:6309
• https://access.redhat.com/errata/RHSA-2026:6568
• https://access.redhat.com/security/cve/CVE-2026-28802
• https://bugzilla.redhat.com/show_bug.cgi?id=2445120
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28802.json