CVE-2026-15432 — Observable Timing Discrepancy in Tink-Java and Tink-Android ChunkedMacVerification
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 …
Published: 2026-07-21 · CVSS: 8.2 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7