CVE-2026-102270: PyJWT: ReDoS vulnerability when calling the `is_pem_format` function.

Overview

Severity

Medium (CVSS 4.4)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-30

EPSS Score

0.19% (percentile: 7.9%)

Affected Products (1)

Other

• 0-17084

Revision History

• 2026-09-30: Information published.