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.
CVE-2022-29217
This high-severity CVE scores 7.4 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 38% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.4
- EG Score
- 7.4(medium)
- EPSS
- 64.5%
- KEV
- Not listed
Published
May 24, 2022
Last Modified
November 21, 2024
References (11)
- security-advisories@githubhttps://github.com/jpadilla/pyjwt/commit/9c528670c455b8d948aff95ed50e22940d1ad3fc
- security-advisories@githubhttps://github.com/jpadilla/pyjwt/releases/tag/2.4.0
- security-advisories@githubhttps://github.com/jpadilla/pyjwt/security/advisories/GHSA-ffqj-6fqr-9h24
- security-advisories@githubhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5PK7IQCBVNLYJEFTPHBBPFP72H4WUFNX/
- security-advisories@githubhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HIYEYZRQEP6QTHT3EHH3RGFYJIHIMAO/
- af854a3a-2127-422b-91ae-364da2661108https://github.com/jpadilla/pyjwt/commit/9c528670c455b8d948aff95ed50e22940d1ad3fc
- af854a3a-2127-422b-91ae-364da2661108https://github.com/jpadilla/pyjwt/releases/tag/2.4.0
- af854a3a-2127-422b-91ae-364da2661108https://github.com/jpadilla/pyjwt/security/advisories/GHSA-ffqj-6fqr-9h24
- af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5PK7IQCBVNLYJEFTPHBBPFP72H4WUFNX/
- af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6HIYEYZRQEP6QTHT3EHH3RGFYJIHIMAO/
- af854a3a-2127-422b-91ae-364da2661108https://www.vicarius.io/vsociety/posts/risky-algorithms-algorithm-confusion-in-pyjwt-cve-2022-29217
Patch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | python3-jwt (2.3.0-1ubuntu0.1) @ jammy | 2026-05-25 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| pyjwt | 1.5.0 ... 2.3.0 (17 versions) | 2.4.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(2)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 9× in last 7d / 45× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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- 2026-05-25 21:39 UTCEG score recompute
- 2026-05-25 21:39 UTCVendor advisory
- 2026-05-24 16:51 UTCEPSS rescore
Related CVEs(same vendor + same CWE)
Same vendor
10 shownubuntu · msrc
Same CWE
10 shownCWE-327
Frequently asked(5)
What is CVE-2022-29217?
When was CVE-2022-29217 disclosed?
Is CVE-2022-29217 actively exploited?
What is the CVSS score of CVE-2022-29217?
How do I remediate CVE-2022-29217?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-29217
Is Your Infrastructure Affected by CVE-2022-29217?
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