{"id":"CVE-2026-5598","title":"Covert timing channel vulnerability in Legion of the Bouncy Castle Inc","summary":"Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules).\n\n This vulnerability is associated with program files FrodoEngine.Java.\n\n\n\nThis issue affects BC-JAVA: from 1.71 before 1.80.2, f…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-385"],"vendor":"Legion of the Bouncy Castle Inc.","product":"core","affected":["core >= 1.71 < 1.80.2","core >= 1.81 < 1.81.1","core >= 1.82 < 1.84"],"published":"2026-04-15","updated":"2026-09-18","sourceUpdated":"2026-09-18T13:18:34.963","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-5598","references":[{"url":"https://github.com/bcgit/bc-java/commit/8692e6b2b191fc4aafa32545c7a78bdb9bf110c5","label":"91579145-5d7b-4cc5-b925-a0262ff19630"},{"url":"https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87","label":"91579145-5d7b-4cc5-b925-a0262ff19630"},{"url":"https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905598","label":"91579145-5d7b-4cc5-b925-a0262ff19630"},{"url":"https://access.redhat.com/errata/RHSA-2026:12267","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:12269","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:18054","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:18055","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:18059","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53644","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53645","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53646","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-5598","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458635","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5598.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5598"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5598"},{"url":"https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905998"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00899,"epssPercentile":0.57606,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-04-15T13:11:48.318645Z"},"scores":{"nvd":7.5,"cna":8.9,"vendor":7.5},"ingestedAt":"2026-09-14T15:23:07.439Z","patched":["jboss_eap_7_4_els_for_rhel_7_server","jboss_eap_7_4_els_for_rhel 8","jboss_eap_8_1_for_rhel 8","jboss_eap_7_4_els_for_rhel 9","jboss_eap_8_1_for_rhel 9","jboss_enterprise_application_platform 7","jboss_enterprise_application_platform 8.1.7.GA"],"slug":"CVE-2026-5598","body":"## Overview\n\nCovert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules).\n\n This vulnerability is associated with program files FrodoEngine.Java.\n\n\n\nThis issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:53644** · Red Hat · fixed in: Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53644)\n- **RHSA-2026:12267** · Red Hat · fixed in: Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server, Red Hat JBoss EAP 7.4 ELS for RHEL 8, Red Hat JBoss EAP 7.4 ELS for RHEL 9 · released 2026-04-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:12267)\n- **RHSA-2026:53645** · Red Hat · fixed in: Red Hat JBoss EAP 7.4 ELS for RHEL 8 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53645)\n- **RHSA-2026:18054** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 8 · released 2026-05-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:18054)\n- **RHSA-2026:53646** · Red Hat · fixed in: Red Hat JBoss EAP 7.4 ELS for RHEL 9 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53646)\n- **RHSA-2026:18055** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 9 · released 2026-05-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:18055)\n- **RHSA-2026:12269** · Red Hat · fixed in: Red Hat JBoss Enterprise Application Platform 7 · released 2026-04-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:12269)\n- **RHSA-2026:18059** · Red Hat · fixed in: Red Hat JBoss Enterprise Application Platform 8.1.7.GA · released 2026-05-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:18059)\n- **Red Hat VEX** · Important · affected: Red Hat Fuse 7 · no fix planned: Red Hat Fuse 7 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5598.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[{"seq":206790,"id":"CVE-2026-5598","ts":1789738937357,"field":"cvss","old":"8.9","new":"7.5"},{"seq":46148,"id":"CVE-2026-5598","ts":1789048273142,"field":"cvss","old":"8.9","new":"7.5"}]}