CVE-2022-29217
Key confusion through non-blocklisted public key formats in PyJWT
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
PyJWT is a Python implementation of RFC 7519. PyJWT supports multiple different JWT signing algorithms. With JWT, an attacker submitting the JWT token can choose the used signing algorithm. The PyJWT library requires that the application chooses what algorithms are supported. The application can specify `jwt.algorithms.get_default_algorithms()` to get support for all algorithms, or specify a single algorithm. The issue is not that big as `algorithms=jwt.algorithms.get_default_algorithms()` has to be used. Users should upgrade to v2.4.0 to receive a patch for this issue. As a workaround, always be explicit with the algorithms that are accepted and expected when decoding.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 1.4% · top 28% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
References (6)
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-ffqj-6fqr-9h24 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/jpadilla/pyjwt/commit/9c528670c455b8d948aff95ed50e22940d1ad3fc (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/jpadilla/pyjwt/releases/tag/2.4.0 (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2022-3cf456dc20 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2022-4ae9110f51 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://www.vicarius.io/vsociety/posts/risky-algorithms-algorithm-confusion-in-pyjwt-cve-2022-29217 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-ffqj-6fqr-9h24 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-29217)Record last updated .