Redirection Flaw in PyJWT Client Leads to Potential Credential Exposure
CVE-2026-102267

7.4HIGH

Key Information:

Vendor

Jpadilla

Status
Pyjwt
Vendor
CVE Published:
28 September 2026

What is CVE-2026-102267?

A redirection flaw in PyJWT affects the PyJWKClient functionality, where redirect destinations are not properly validated against the JWKS trust boundary. This vulnerability allows an attacker to manipulate a trusted JWKS endpoint into issuing a malicious redirect, which can lead to the consumption of compromised key material and potentially expose sensitive credentials. The flaw was rectified in version 2.14.0.

Affected Version(s)

pyjwt < 2.14.0

References

https://github.com/jpadilla/pyjwt/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/jpadilla/pyjwt/commit/0a795b8e1f6ef08f...
x_refsource_MISC
https://github.com/jpadilla/pyjwt/releases/tag/2.14.0
x_refsource_MISC

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.