DEBIAN-CVE-2026-102271
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-102271
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102271.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-102271
- Upstream
- Published
- 2026-09-28T21:17:15Z
- Modified
- 2026-09-29T11:00:08Z
- Severity
-
- 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
PyJWT is a Python implementation of JSON Web Token standards. From 2.4.0 until 2.14.0, PyJWT HMACAlgorithm.prepare_key is affected because asymmetric-key guard relies on textual markers that are absent from DER encoding. This occurs when an application mixes HMAC and asymmetric algorithms and supplies a DER public key as the shared verification key. As a result, PyJWT uses public DER bytes as an HMAC secret. Consequently, an attacker who knows the public key can forge authenticated HMAC tokens. This issue is fixed in version 2.14.0.
- References
Affected packages
Debian:12 / pyjwt
Package
- Name
- pyjwt
- Purl
- pkg:deb/debian/pyjwt?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / pyjwt
Package
- Name
- pyjwt
- Purl
- pkg:deb/debian/pyjwt?arch=source&distro=trixie
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:14 / pyjwt
Package
- Name
- pyjwt
- Purl
- pkg:deb/debian/pyjwt?arch=source&distro=forky