CVE-2022-39227
9.1
CRITICAL · CVSS 3.1 · EPSS 5.3% (pctl 92)
In your normal cycle
Critical by CVSS (9.1), but no sign of active exploitation.
Description
python-jwt is a module for generating and verifying JSON Web Tokens. Versions prior to 3.3.4 are subject to Authentication Bypass by Spoofing, resulting in identity spoofing, session hijacking or authentication bypass. An attacker who obtains a JWT can arbitrarily forge its contents without knowing the secret key. Depending on the application, this may for example enable the attacker to spoof other user's identities, hijack their sessions, or bypass authentication. Users should upgrade to version 3.3.4. There are no known workarounds.
Scoring
| CVSS | 9.1 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| EPSS | 5.34% — more likely to be exploited than 92% of all CVEs |
| Weakness | CWE-290 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2022-09-23 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| python-jwt project | python-jwt |
References
- https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9
- https://github.com/davedoesdev/python-jwt/security/advisories/GHSA-5p8v-58qm-c7fp
- https://github.com/pypa/advisory-database/blob/main/vulns/python-jwt/PYSEC-2022-259.yaml
- https://www.vicarius.io/vsociety/posts/authentication-bypass-in-python-jwt
- https://github.com/davedoesdev/python-jwt/commit/88ad9e67c53aa5f7c43ec4aa52ed34b7930068c9
- https://github.com/davedoesdev/python-jwt/security/advisories/GHSA-5p8v-58qm-c7fp
- https://github.com/pypa/advisory-database/blob/main/vulns/python-jwt/PYSEC-2022-259.yaml
- https://www.vicarius.io/vsociety/posts/authentication-bypass-in-python-jwt
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