VULNERABILITY INTELLIGENCE

CVE-2026-15432

CVSS score5.9 MEDIUM
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-07-21
Last modified2026-09-22
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Description

When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison. This potentially allows an attacker to use timinig information as a side channel in order to get information how many bytes of a given tag match the correct tag. This in turn could allow to find a correct tag bytewise.

Weakness classification

  • cve-coordination@google.com: CWE-208

Primary references