CVE-2026-103001: PyJWT.decode() reintroduces options-dict mutation, enabling silent claim-verification bypass on dict reuse

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-10-03

Last Updated

2026-10-06

EPSS Score

0.24% (percentile: 13.2%)

Affected Products (1)

Other

• 0-17084

Revision History

• 2026-10-03: Information published.
• 2026-10-05: Information published.
• 2026-10-06: Information published.