{"id":"GHSA-wg6q-6289-32hp","summary":"Bouncy Castle Crypto Package For Java: Use of a Broken or Risky Cryptographic Algorithm vulnerability in bcpkix modules","details":": Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules).\n\n\nPKIX draft CompositeVerifier accepts empty signature sequence as valid.\n\n\nThis issue affects BC-JAVA: from 1.49 before 1.84.","aliases":["CVE-2026-5588"],"modified":"2026-08-24T00:36:42.861890Z","published":"2026-04-15T18:31:54Z","database_specific":{"cwe_ids":["CWE-327"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-04-16T21:32:20Z","nvd_published_at":"2026-04-15T10:16:49Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5588"},{"type":"WEB","url":"https://github.com/bcgit/bc-java/commit/656bae0dbd9b1521f840521ff786e78749fe3057"},{"type":"PACKAGE","url":"https://github.com/bcgit/bc-java"},{"type":"WEB","url":"https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905588"}],"affected":[{"package":{"name":"org.bouncycastle:bcpkix-jdk18on","ecosystem":"Maven","purl":"pkg:maven/org.bouncycastle/bcpkix-jdk18on"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.49"},{"fixed":"1.84"}]}],"versions":["1.71","1.71.1","1.72","1.73","1.74","1.75","1.76","1.77","1.78","1.78.1","1.79","1.80","1.80.2","1.81","1.81.1","1.82","1.83"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-wg6q-6289-32hp/GHSA-wg6q-6289-32hp.json"}},{"package":{"name":"org.bouncycastle:bcpkix-jdk15to18","ecosystem":"Maven","purl":"pkg:maven/org.bouncycastle/bcpkix-jdk15to18"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.49"},{"fixed":"1.84"}]}],"versions":["1.63","1.64","1.65","1.66","1.67","1.68","1.69","1.70","1.71","1.72","1.73","1.74","1.75","1.76","1.77","1.78","1.78.1","1.79","1.80","1.81","1.82","1.83"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-wg6q-6289-32hp/GHSA-wg6q-6289-32hp.json"}},{"package":{"name":"org.bouncycastle:bcpkix-jdk15on","ecosystem":"Maven","purl":"pkg:maven/org.bouncycastle/bcpkix-jdk15on"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.49"},{"fixed":"1.84"}]}],"versions":["1.49","1.50","1.51","1.52","1.53","1.54","1.55","1.56","1.57","1.58","1.59","1.60","1.61","1.62","1.63","1.64","1.65","1.66","1.67","1.68","1.69","1.70"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-wg6q-6289-32hp/GHSA-wg6q-6289-32hp.json"}},{"package":{"name":"org.bouncycastle:bcpkix-jdk14","ecosystem":"Maven","purl":"pkg:maven/org.bouncycastle/bcpkix-jdk14"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.49"},{"fixed":"1.84"}]}],"versions":["1.49","1.50","1.51","1.53","1.54","1.55","1.56","1.57","1.58","1.59","1.60","1.61","1.62","1.63","1.64","1.65","1.67","1.68","1.69","1.70","1.71","1.72","1.73","1.74","1.75","1.76","1.77","1.78","1.78.1","1.79","1.80","1.81","1.82","1.83"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-wg6q-6289-32hp/GHSA-wg6q-6289-32hp.json"}},{"package":{"name":"org.bouncycastle:bcpkix-debug-jdk18on","ecosystem":"Maven","purl":"pkg:maven/org.bouncycastle/bcpkix-debug-jdk18on"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.49"},{"fixed":"1.84"}]}],"versions":["1.73","1.74","1.75","1.76","1.77","1.78","1.78.1","1.79","1.81","1.82","1.83"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-wg6q-6289-32hp/GHSA-wg6q-6289-32hp.json"}},{"package":{"name":"org.bouncycastle:bcpkix-debug-jdk15to18","ecosystem":"Maven","purl":"pkg:maven/org.bouncycastle/bcpkix-debug-jdk15to18"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.49"},{"fixed":"1.84"}]}],"versions":["1.73","1.74","1.75","1.76","1.77","1.78","1.78.1","1.79","1.80","1.81","1.82","1.83"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-wg6q-6289-32hp/GHSA-wg6q-6289-32hp.json"}},{"package":{"name":"org.bouncycastle:bcpkix-debug-jdk14","ecosystem":"Maven","purl":"pkg:maven/org.bouncycastle/bcpkix-debug-jdk14"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.49"},{"fixed":"1.84"}]}],"versions":["1.81","1.82","1.83"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-wg6q-6289-32hp/GHSA-wg6q-6289-32hp.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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:Green"}]}