{"id":"CVE-2026-59642","state":"PUBLISHED","title":"CMS AuthenticatedData content not bound to MAC when authAttrs present","description":"In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).","publishedAt":"2026-08-03T00:53:28.335Z","updatedAt":"2026-08-03T13:27:19.619Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber","source":"bcorg"},"assigner":"bcorg","products":["Legion of the Bouncy Castle Inc. BC-JAVA","Legion of the Bouncy Castle Inc. BC-LTS-JAVA","Legion of the Bouncy Castle Inc. BC-FJA"],"affected":[{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-JAVA","packageName":"bcpkix","packageURL":"pkg:maven/org.bouncycastle/bcpkix-jdk18on","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.85","versionType":"maven"}],"platforms":["all"],"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java/","repo":"https://github.com/bcgit/bc-java","modules":["pkix"],"programFiles":["RecipientInformation"]},{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-LTS-JAVA","packageName":"bcpkix-lts8on","packageURL":"pkg:maven/org.bouncycastle/bcpkix-lts8on","defaultStatus":"unaffected","versions":[{"version":"2.73.0","status":"affected","lessThan":"2.73.12","versionType":"maven"}],"platforms":["all"],"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java-lts/","repo":"https://github.com/bcgit/bc-lts-java","modules":["pkix"],"programFiles":["RecipientInformation"]},{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-FJA","packageName":"bcpkix-fips","packageURL":"pkg:maven/org.bouncycastle/bcpkix-fips","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThan":"1.0.12","versionType":"maven"},{"version":"2.0.0","status":"affected","lessThan":"2.0.12","versionType":"maven"},{"version":"2.1.0","status":"affected","lessThan":"2.1.12","versionType":"maven"}],"platforms":["all"],"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java-fips/"}],"references":["https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059642","https://github.com/bcgit/bc-java/commit/2117f316a5a47308f3e569695a6592b16aac0dd7"],"weaknesses":["CWE-354"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59642.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59642","state":"PUBLISHED","datePublished":"2026-08-03T00:53:28.335Z","dateUpdated":"2026-08-03T13:27:19.619Z","assignerShortName":"bcorg","assignerOrgId":"91579145-5d7b-4cc5-b925-a0262ff19630","dateReserved":"2026-07-06T06:58:29.263Z"},"containers":{"cna":{"title":"CMS AuthenticatedData content not bound to MAC when authAttrs present","descriptions":[{"lang":"en","value":"In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series)."}],"affected":[{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-JAVA","packageName":"bcpkix","packageURL":"pkg:maven/org.bouncycastle/bcpkix-jdk18on","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.85","versionType":"maven"}],"platforms":["all"],"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java/","repo":"https://github.com/bcgit/bc-java","modules":["pkix"],"programFiles":["RecipientInformation"]},{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-LTS-JAVA","packageName":"bcpkix-lts8on","packageURL":"pkg:maven/org.bouncycastle/bcpkix-lts8on","defaultStatus":"unaffected","versions":[{"version":"2.73.0","status":"affected","lessThan":"2.73.12","versionType":"maven"}],"platforms":["all"],"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java-lts/","repo":"https://github.com/bcgit/bc-lts-java","modules":["pkix"],"programFiles":["RecipientInformation"]},{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-FJA","packageName":"bcpkix-fips","packageURL":"pkg:maven/org.bouncycastle/bcpkix-fips","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThan":"1.0.12","versionType":"maven"},{"version":"2.0.0","status":"affected","lessThan":"2.0.12","versionType":"maven"},{"version":"2.1.0","status":"affected","lessThan":"2.1.12","versionType":"maven"}],"platforms":["all"],"collectionURL":"https://www.bouncycastle.org/download/bouncy-castle-java-fips/"}],"references":[{"url":"https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059642","tags":["vendor-advisory"]},{"url":"https://github.com/bcgit/bc-java/commit/2117f316a5a47308f3e569695a6592b16aac0dd7","tags":["patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","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":"AMBER","version":"4.0","baseSeverity":"HIGH","baseScore":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-354","lang":"en","description":"CWE-354 Improper Validation of Integrity Check Value","type":"CWE"}]}],"providerMetadata":{"shortName":"bcorg","orgId":"91579145-5d7b-4cc5-b925-a0262ff19630","dateUpdated":"2026-08-03T05:03:43.251Z"},"credits":[{"lang":"en","value":"Alex Gaynor in collaboration with Claude and Anthropic Research","type":"reporter"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"bc release-notes template"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-03T13:27:10.316195Z","id":"CVE-2026-59642","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-03T13:27:19.619Z"}}]}}}