7.4

CVE-2026-48526

Exploit

PyJWT: Public-key JWK accepted as HMAC secret enables forged HS256 tokens when mixed families are allowed

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the secret key for HMAC algorithm. This vulnerability is fixed in 2.13.0.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Pyjwt Project ≫ Pyjwt Version < 2.13.0
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.39% 0.313
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 7.4 2.2 5.2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.4 2.2 5.2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-287 Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

CWE-347 Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

https://bugzilla.redhat.com/show_bug.cgi?id=2482734
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48526.json
https://access.redhat.com/errata/RHSA-2026:34365
https://access.redhat.com/errata/RHSA-2026:30088
https://access.redhat.com/errata/RHSA-2026:30089
https://access.redhat.com/errata/RHSA-2026:34374
https://access.redhat.com/errata/RHSA-2026:34160
https://access.redhat.com/errata/RHSA-2026:36350
https://access.redhat.com/errata/RHSA-2026:28571
https://access.redhat.com/errata/RHSA-2026:30076
https://access.redhat.com/errata/RHSA-2026:33683
https://access.redhat.com/errata/RHSA-2026:25928
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-xgmm-8j9v-c9wx
Vendor Advisory
Exploit
https://access.redhat.com/errata/RHSA-2026:25902
https://access.redhat.com/errata/RHSA-2026:26206
https://access.redhat.com/errata/RHSA-2026:35835
https://access.redhat.com/errata/RHSA-2026:35836
https://access.redhat.com/errata/RHSA-2026:35837
https://access.redhat.com/errata/RHSA-2026:35845
https://access.redhat.com/security/cve/CVE-2026-48526
https://access.redhat.com/errata/RHSA-2026:37275