CVE-2026-102275
pyjwt: PyJWT: Token verification bypass via mismatched OKP key components
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 29, 2026
Updated · October 30, 2026
Description
A flaw was found in PyJWT. When importing an Octet Key Pair (OKP) private JSON Web Key (JWK), the library does not verify that the public key component matches the private key component. In applications that accept private key parameters from proof headers, a remote attacker can exploit this discrepancy to bypass token verification and use a stolen sender-constrained token without possessing the legitimate private key.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
CWE-347 · Improper Verification of Cryptographic Signature