{"id":"CVE-2026-5588","title":"Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc","summary":"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 Cast…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-327","CWE-347"],"vendor":"Legion of the Bouncy Castle Inc.","product":"bcpkix","affected":["bcpkix >= 1.67 < 1.80.2","bcpkix >= 1.81 < 1.81.1","bcpkix >= 1.82 < 1.84","bcpkix >= 2.0.6 < 2.0.11","bcpkix >= 2.1.7 < 2.1.11","bcpkix >= 2.73.7 < 2.73.11"],"patched":["jboss_eap_7_4_els_for_rhel_7_server","jboss_eap_8_1_for_rhel 8","jboss_eap_8_1_for_rhel 9","openshift_developer_tools_and_services 4.12","openshift_developer_tools_and_services 4.13","openshift_developer_tools_and_services 4.14","openshift_developer_tools_and_services 4.15","openshift_developer_tools_and_services 4.16","openshift_developer_tools_and_services 4.17","openshift_developer_tools_and_services 4.18","openshift_developer_tools_and_services 4.19","openshift_developer_tools_and_services 4.20","openshift_developer_tools_and_services 4.21","openshift_developer_tools_and_services 4.22","amq_broker 7.12.7","amq_broker 7.13.5","build_of_apache_camel_4_14_for_quarkus 3.27","jboss_enterprise_application_platform 7.4.25","jboss_enterprise_application_platform 8.1","openshift_dev_spaces 3.28","build_of_apache_camel_4_18_1_for_spring_boot 3.5.14","build_of_quarkus 3.20.6.SP1","build_of_quarkus 3.27.3.SP1"],"published":"2026-04-15","updated":"2026-09-18","sourceUpdated":"2026-09-18T13:18:34.057","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-5588","references":[{"url":"https://github.com/bcgit/bc-java/commit/656bae0dbd9b1521f840521ff786e78749fe3057","label":"91579145-5d7b-4cc5-b925-a0262ff19630"},{"url":"https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905588","label":"91579145-5d7b-4cc5-b925-a0262ff19630"},{"url":"https://access.redhat.com/errata/RHSA-2026:11720","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:11721","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:13631","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:14272","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:14276","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:17668","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-2026:21772","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/errata/RHSA-2026:60239","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60246","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60247","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60248","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60249","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60250","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60251","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60252","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60254","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60256","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60259","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:66488","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-5588","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458634","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5588.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53806","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5588"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5588"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00777,"epssPercentile":0.54323,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-04-15T19:35:32.235455Z"},"scores":{"nvd":7.5,"cna":6.3,"vendor":7.5},"ingestedAt":"2026-07-16T12:53:55.945Z","slug":"CVE-2026-5588","body":"## Overview\n\nUse 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.\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-2026:18054** · 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-2026:18055** · 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-2026:60247** · Red Hat · fixed in: OpenShift Developer Tools and Services 4.12 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60247)\n- **RHSA-2026:60249** · Red Hat · fixed in: OpenShift Developer Tools and Services 4.13 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60249)\n- **RHSA-2026:60248** · Red Hat · fixed in: OpenShift Developer Tools and Services 4.14 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60248)\n- **RHSA-2026:60239** · Red Hat · fixed in: OpenShift Developer Tools and Services 4.15 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60239)\n- **RHSA-2026:60251** · Red Hat · fixed in: OpenShift Developer Tools and Services 4.16 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60251)\n- **RHSA-2026:60246** · Red Hat · fixed in: OpenShift Developer Tools and Services 4.17 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60246)\n- **RHSA-2026:60250** · Red Hat · fixed in: OpenShift Developer Tools and Services 4.18 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60250)\n- **RHSA-2026:60252** · Red Hat · fixed in: OpenShift Developer Tools and Services 4.19 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60252)\n- **Red Hat VEX** · Important · affected: OpenShift Developer Tools and Services, Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Debezium 3, Red Hat Enterprise Linux 8, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 8, … · no fix planned: Red Hat build of Debezium 3, Red Hat Enterprise Linux 8, Red Hat Fuse 7, Red Hat Process Automation 7, … · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5588.json)\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-2026:53646** · 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)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}