{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-8149", "assignerOrgId": "91579145-5d7b-4cc5-b925-a0262ff19630", "state": "PUBLISHED", "assignerShortName": "bcorg", "dateReserved": "2026-05-08T05:23:49.585Z", "datePublished": "2026-05-08T06:01:40.875Z", "dateUpdated": "2026-07-21T04:59:54.559Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "91579145-5d7b-4cc5-b925-a0262ff19630", "shortName": "bcorg", "dateUpdated": "2026-07-21T04:59:54.559Z" }, "title": "GCM chunking can lead to bad tag exception on decryption", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-1068", "description": "CWE-1068", "type": "CWE" } ] } ], "affected": [ { "vendor": "Legion of the Bouncy Castle Inc.", "product": "BC-LTS", "platforms": [ "X86_64", "AVX", "AVX-512f", "Linux" ], "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-fips/", "packageName": "bcprov-lts8on", "repo": "https://repo1.maven.org/maven2/org/bouncycastle/bcprov-lts18on", "programFiles": [ "gcm128w", "gcm512w" ], "versions": [ { "status": "affected", "version": "2.73.0", "lessThan": "2.73.11", "versionType": "maven" } ], "defaultStatus": "unaffected" }, { "vendor": "Legion of the Bouncy Castle Inc.", "product": "BC-FJA", "platforms": [ "Linux", "X86_64", "AVX", "AVX-512f" ], "collectionURL": "https://www.bouncycastle.org/download/bouncy-castle-java-fips/", "packageName": "bc-fips", "repo": "https://repo1.maven.org/maven2/org/bouncycastle/bc-fips", "programFiles": [ "gcm128w.c", "gcm512w.c" ], "versions": [ { "status": "affected", "version": "2.1.0", "lessThan": "2.1.3", "versionType": "maven" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "A vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on X86_64, AVX, AVX-512f, Linux, Legion of the Bouncy Castle Inc. BC-FJA bc-fips on Linux, X86_64, AVX, AVX-512f.\n\n This vulnerability is associated with program files gcm128w, gcm512w, gcm128w.C, gcm512w.C.\n\n\n\nThis issue affects BC-LTS: from 2.73.0 before 2.73.11; BC-FJA: from 2.1.0 before 2.1.3.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "A vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on X86_64, AVX, AVX-512f, Linux, Legion of the Bouncy Castle Inc. BC-FJA bc-fips on Linux, X86_64, AVX, AVX-512f.

This vulnerability is associated with program files gcm128w, gcm512w, gcm128w.C, gcm512w.C.

This issue affects BC-LTS: from 2.73.0 before 2.73.11; BC-FJA: from 2.1.0 before 2.1.3.

" } ] } ], "references": [ { "url": "https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%908149", "tags": [ "vendor-advisory" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NEGLIGIBLE", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "MODERATE", "providerUrgency": "AMBER", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.1, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/S:N/RE:M/U:Amber" } } ], "workarounds": [ { "lang": "en", "value": "If possible pass whole message to GCM via doFinal(..) for decryption. Issue only occurs when decryption is chunked at certain boundaries.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "If possible pass whole message to GCM via doFinal(..) for decryption. Issue only occurs when decryption is chunked at certain boundaries." } ] } ], "credits": [ { "lang": "en", "value": "Michael Schäfer, Kiteworks", "type": "finder" } ], "source": { "discovery": "EXTERNAL" }, "x_generator": { "engine": "Vulnogram 1.0.2" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-05-08T12:50:54.859989Z", "id": "CVE-2026-8149", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-08T12:51:03.873Z" } } ] } }