CVE-2026-48525: PyJWT: Unauthenticated DoS via unbounded Base64URL decoding of unused payload segment in b64=false detached JWS

Overview

Severity

Medium (CVSS 5.3)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-07-24

EPSS Score

0.37% (percentile: 29.6%)

Affected Products (1)

Other

• 20159-17084

Revision History

• 2026-07-24: Information published.