CVE-2026-102268: jpadilla pyjwt · Improper Verification of Cryptographic Signature
Affects jpadilla pyjwtSource CVE Database V5
Not known to be exploited · CVSS 9.1 Critical : upgrade to 2.14.0 as a priority.
Data as of 12 Nov 2026, 23:24 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.14.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 28 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Upgrade jpadilla pyjwt to 2.14.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| jpadillapyjwt | Affected
| Fixed in
|
PyPIpyjwtpkg:pypi/pyjwtOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade PyJWT to version 2.14.0 or later, where this vulnerability is fixed. No other mitigation is required as the issue is resolved in the official release.
Description
PyJWT versions prior to 2.14.0 contain a vulnerability in the is_pem_format function that improperly verifies cryptographic signatures. This flaw allows an attacker who knows a public key to forge authenticated HMAC tokens by exploiting how the library misinterprets certain malformed PEM public keys as HMAC secrets. The issue is resolved in version 2.14.0.