PyJWT accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation)
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| jpadilla | pyjwt | affected |
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No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Jpadilla | Pyjwt |
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| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4564-1 | pyjwt security update |
Debian DSA |
DSA-6259-1 | pyjwt security update |
Github GHSA |
GHSA-752w-5fwx-jx9f | PyJWT accepts unknown `crit` header extensions |
Ubuntu USN |
USN-8133-1 | PyJWT vulnerability |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.299% probability within 30 days)
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| References |
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| First Time appeared |
Pyjwt Project
Pyjwt Project pyjwt |
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| CPEs | cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Pyjwt Project
Pyjwt Project pyjwt |
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| Metrics |
ssvc
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| First Time appeared |
Jpadilla
Jpadilla pyjwt |
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| Vendors & Products |
Jpadilla
Jpadilla pyjwt |
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| Weaknesses | CWE-347 | |
| References |
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| Metrics |
threat_severity
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threat_severity
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| Description | PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. This vulnerability is fixed in 2.12.0. | |
| Title | PyJWT accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation) | |
| Weaknesses | CWE-345 CWE-863 |
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| References |
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| Metrics |
cvssV3_1
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