- Description
- 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.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
- Products
- pyjwt
CVSS 3.1
- Type
- Secondary
- Base score
- 7.4
- Impact score
- 5.2
- Exploitability score
- 2.2
- Vector string
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Severity
- HIGH
- security-advisories@github.com
- CWE-347
- Hype score
- Not currently trending
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:pyjwt_project:pyjwt:2.13.0:*:*:*:*:*:*:*",
"matchCriteriaId": "2E8D3157-85D1-4276-A526-77BD2F16C9A3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
]