CVE-2022-48566: An issue was discovered in compare_digest in Lib/hmac.py in Python through 3.9.1. Constant-time-defeating optimisations were possible in the accumulator variable in hmac.compare_digest.

Overview

Severity

Medium (CVSS 5.9)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2023-Aug

Released

2026-10-21

EPSS Score

1.30% (percentile: 70.2%)

Affected Products (1)

Other

• 21639-17084

Revision History

• 2026-10-21: Information published.