{"id":"CVE-2026-15432","title":"When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison","summary":"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 ho…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-208"],"vendor":"google","product":"tink_java","affected":["tink_java <= 1.21.0"],"published":"2026-07-21","updated":"2026-09-22","sourceUpdated":"2026-09-22T13:09:49.980","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-15432","references":[{"url":"https://github.com/tink-crypto/tink-java/issues/75","label":"cve-coordination@google.com"}],"tags":["nvd"],"epss":0.00203,"epssPercentile":0.10563,"ingestedAt":"2026-09-22T14:04:19.575Z","slug":"CVE-2026-15432","body":"## Overview\n\nWhen 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.\n\n## Affected\n\n- `tink_java <= 1.21.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}