{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-15432", "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778", "state": "PUBLISHED", "assignerShortName": "Google", "dateReserved": "2026-07-10T17:38:15.752Z", "datePublished": "2026-07-21T16:42:12.113Z", "dateUpdated": "2026-07-21T16:42:12.113Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "14ed7db2-1595-443d-9d34-6215bf890778", "shortName": "Google", "dateUpdated": "2026-07-21T16:42:12.113Z"}, "title": "Observable Timing Discrepancy in Tink-Java and Tink-Android ChunkedMacVerification", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-208", "description": "CWE-208 Observable Timing Discrepancy", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-172", "descriptions": [{"lang": "en", "value": "CAPEC-172 Manipulate Timing and State"}]}], "affected": [{"vendor": "Google", "product": "Tink-Java", "versions": [{"status": "affected", "version": "All releases before 1.21.0, including 1.21.0."}], "defaultStatus": "unaffected"}, {"vendor": "Google", "product": "Tink-Android", "versions": [{"status": "affected", "version": "All releases before 1.21.0, including 1.21.0."}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "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."}]}], "references": [{"url": "https://github.com/tink-crypto/tink-java/issues/75"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.2, "vectorString": "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"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}}}

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