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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/tink-crypto/tink-java/issues/75	Patch Vendor Advisory Issue Tracking

Configurations

Configuration 1 (hide)

cpe:2.3:a:google:tink_java:*:*:*:*:*:*:*:*

History

22 Sep 2026, 13:09

Type	Values Removed	Values Added
CPE		cpe:2.3:a:google:tink_java::::::::
References	~~() https://github.com/tink-crypto/tink-java/issues/75 -~~	() https://github.com/tink-crypto/tink-java/issues/75 - Patch, Vendor Advisory, Issue Tracking
First Time		Google tink Java Google
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.9

Information

Published : 2026-07-21 17:17

Updated : 2026-09-22 13:09

NVD link : CVE-2026-15432

Mitre link : CVE-2026-15432

CVE.ORG link : CVE-2026-15432

JSON object : View

Products Affected

google

tink_java

CWE

CWE-208

Observable Timing Discrepancy

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