CVE-2026-15432highCWE-208

CVE-2026-15432: high-severity vulnerability in Google Tink-Java

Observable Timing Discrepancy in Tink-Java and Tink-Android ChunkedMacVerification

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.2epss 0.2%
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:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
Google · Tink-AndroidGoogle · Tink-Java