CVE-2026-15432

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.

Score

CVSS 4.0 8.2 High

Status

Analyzed - cve-coordination@google.com

Published

2026-07-21

Last modified

2026-07-22

Weaknesses

CWE-208

Affected products

• Tink-android (Google)
• Tink-java (Google)
• Tink Java (Google)

References

• https://github.com/tink-crypto/tink-java/issues/75