{"id":"CVE-2026-58063","state":"PUBLISHED","title":"BCFKS keystore load honours unbounded KDF cost from untrusted file","description":"In Bouncy Castle for Java before 1.85, BCFKS keystore load honours unbounded KDF cost from untrusted file. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).","publishedAt":"2026-08-03T02:29:09.708Z","updatedAt":"2026-08-03T15:36:41.662Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/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":"bcprov","packageURL":"pkg:maven/org.bouncycastle/bcprov-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":["prov"],"programFiles":["BcFKSKeyStoreSpi"]},{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-LTS-JAVA","packageName":"bcprov-lts8on","packageURL":"pkg:maven/org.bouncycastle/bcprov-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":["prov"],"programFiles":["BcFKSKeyStoreSpi"]},{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-FJA","packageName":"bc-fips","packageURL":"pkg:maven/org.bouncycastle/bc-fips","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThan":"1.0.2.7","versionType":"maven"},{"version":"2.0.0","status":"affected","lessThan":"2.0.2","versionType":"maven"},{"version":"2.1.0","status":"affected","lessThan":"2.1.3","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%9058063","https://github.com/bcgit/bc-java/commit/81737a56ef4489da1f849cf549df95e338ea6b06"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/58xxx/CVE-2026-58063.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-58063","state":"PUBLISHED","datePublished":"2026-08-03T02:29:09.708Z","dateUpdated":"2026-08-03T15:36:41.662Z","assignerShortName":"bcorg","assignerOrgId":"91579145-5d7b-4cc5-b925-a0262ff19630","dateReserved":"2026-06-28T01:21:46.335Z"},"containers":{"cna":{"title":"BCFKS keystore load honours unbounded KDF cost from untrusted file","descriptions":[{"lang":"en","value":"In Bouncy Castle for Java before 1.85, BCFKS keystore load honours unbounded KDF cost from untrusted file. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series)."}],"affected":[{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-JAVA","packageName":"bcprov","packageURL":"pkg:maven/org.bouncycastle/bcprov-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":["prov"],"programFiles":["BcFKSKeyStoreSpi"]},{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-LTS-JAVA","packageName":"bcprov-lts8on","packageURL":"pkg:maven/org.bouncycastle/bcprov-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":["prov"],"programFiles":["BcFKSKeyStoreSpi"]},{"vendor":"Legion of the Bouncy Castle Inc.","product":"BC-FJA","packageName":"bc-fips","packageURL":"pkg:maven/org.bouncycastle/bc-fips","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThan":"1.0.2.7","versionType":"maven"},{"version":"2.0.0","status":"affected","lessThan":"2.0.2","versionType":"maven"},{"version":"2.1.0","status":"affected","lessThan":"2.1.3","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%9058063","tags":["vendor-advisory"]},{"url":"https://github.com/bcgit/bc-java/commit/81737a56ef4489da1f849cf549df95e338ea6b06","tags":["patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","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":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770 Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"bcorg","orgId":"91579145-5d7b-4cc5-b925-a0262ff19630","dateUpdated":"2026-08-03T05:48:15.762Z"},"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":"2026-08-03T15:36:13.891376Z","id":"CVE-2026-58063","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-03T15:36:41.662Z"}}]}}}