DEBIAN-CVE-2026-102272

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Source
https://security-tracker.debian.org/tracker/CVE-2026-102272
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102272.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-102272
Upstream
Published
2026-09-28T21:17:15Z
Modified
2026-09-30T09:00:06Z
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 2.13.0 until 2.14.0, HMACAlgorithm.prepare_key in jwt/algorithms.py is affected because raw-JWK detector does not normalize accepted Unicode byte-order marks before checking for JSON. This occurs when a public JWK is prefixed with a UTF-8 BOM and used in a mixed-algorithm verification path. As a result, public JWK bypasses asymmetric-key detection and becomes the HMAC secret. Consequently, an attacker who knows the public key can forge authenticated 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
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.6.0-1
2.6.0-1+deb12u1
2.7.0-1
2.10.1-1
2.10.1-2
2.10.1-3
2.10.1-4
2.11.0-2
2.12.1-1
2.13.0-1
2.14.0-1
2.15.0-1
2.15.1-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102272.json"

Debian:13 / pyjwt

Package

Name
pyjwt
Purl
pkg:deb/debian/pyjwt?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.10.1-2
2.10.1-2+deb13u1
2.10.1-3
2.10.1-4
2.11.0-2
2.12.1-1
2.13.0-1
2.14.0-1
2.15.0-1
2.15.1-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102272.json"

Debian:14 / pyjwt

Package

Name
pyjwt
Purl
pkg:deb/debian/pyjwt?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.10.1-2
2.10.1-3
2.10.1-4
2.11.0-2
2.12.1-1
2.13.0-1
2.14.0-1
2.15.0-1
2.15.1-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102272.json"