{"cve":"CVE-2026-5588","nvd":{"published":"2026-04-15T10:16:49.597","modified":"2026-10-26T21:10:00.170","status":"Awaiting Analysis","description":"Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules), Legion of the Bouncy Castle Inc. BCPIX-LTS bcpkix on All (pkix modules).\n\n This vulnerability is associated with program files JcaContentVerifierProviderBuilder.Java, JcaContentVerfierProviderBuilder.Java.\n\n\n\nThis issue affects BC-JAVA: from 1.67 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84; BCPKIX-FIPS: from 2.0.6 before 2.0.11, from 2.1.7 before 2.1.11; BCPIX-LTS: from 2.73.7 before 2.73.11.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/U:Amber","score":6.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-327","CWE-347"],"references":["https://github.com/bcgit/bc-java/commit/656bae0dbd9b1521f840521ff786e78749fe3057","https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905588","https://access.redhat.com/errata/RHSA-2026:11720","https://access.redhat.com/errata/RHSA-2026:11721","https://access.redhat.com/errata/RHSA-2026:13631"],"products":[],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-5588","score":0.00777,"percentile":0.55547,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-wg6q-6289-32hp","url":"https://osv.dev/vulnerability/GHSA-wg6q-6289-32hp","summary":"Bouncy Castle Crypto Package For Java: Use of a Broken or Risky Cryptographic Algorithm vulnerability in bcpkix modules","modified":"2026-09-10T03:50:45.075900186Z","packages":[{"ecosystem":"Maven","name":"org.bouncycastle:bcpkix-jdk18on","purl":"pkg:maven/org.bouncycastle/bcpkix-jdk18on","ranges":[">=1.49 <1.84"],"fixed":["1.84"]},{"ecosystem":"Maven","name":"org.bouncycastle:bcpkix-jdk15to18","purl":"pkg:maven/org.bouncycastle/bcpkix-jdk15to18","ranges":[">=1.49 <1.84"],"fixed":["1.84"]},{"ecosystem":"Maven","name":"org.bouncycastle:bcpkix-jdk15on","purl":"pkg:maven/org.bouncycastle/bcpkix-jdk15on","ranges":[">=1.49 <1.84"],"fixed":["1.84"]},{"ecosystem":"Maven","name":"org.bouncycastle:bcpkix-jdk14","purl":"pkg:maven/org.bouncycastle/bcpkix-jdk14","ranges":[">=1.49 <1.84"],"fixed":["1.84"]},{"ecosystem":"Maven","name":"org.bouncycastle:bcpkix-debug-jdk18on","purl":"pkg:maven/org.bouncycastle/bcpkix-debug-jdk18on","ranges":[">=1.49 <1.84"],"fixed":["1.84"]},{"ecosystem":"Maven","name":"org.bouncycastle:bcpkix-debug-jdk15to18","purl":"pkg:maven/org.bouncycastle/bcpkix-debug-jdk15to18","ranges":[">=1.49 <1.84"],"fixed":["1.84"]},{"ecosystem":"Maven","name":"org.bouncycastle:bcpkix-debug-jdk14","purl":"pkg:maven/org.bouncycastle/bcpkix-debug-jdk14","ranges":[">=1.49 <1.84"],"fixed":["1.84"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}