medium5.9
CVE-2026-15432
When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Tink Java | through 1.21.0 |