CVE catalog
CVE-2026-5598
Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affect
- Severity
- High · CVSS 8.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:X/RE:X/U:Red - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.90% · Oct 25, 2026
Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | bouncycastle | sid | 1.86.2-1 | fixed |
| Debian | bouncycastle | forky | 1.86-1 | fixed |
| Debian | bouncycastle | trixie | 1.80-3 | vulnerable |
| Debian | bouncycastle | bookworm | 1.72-2 | vulnerable |
| Cpe | bouncycastle | Not reported | Not reported | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | bouncycastle | source | sid | 1.86-1 | not yet assigned | Not reported | [1134386] |
| Debian | bouncycastle | source | forky | 1.86-1 | not yet assigned | Not reported | [1134386] |
| Debian | bouncycastle | source | trixie | (unfixed) | not yet assigned | Not reported | [1134386] |
| Debian | bouncycastle | source | bookworm | (unfixed) | not yet assigned | Not reported | [1134386] |
Notes
[trixie] bouncycastle: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libbcjmail-java]Affected
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
- [libbcmail-java]Affected
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
- [libbcpg-java]Affected
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
- [libbcpkix-java]Affected
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
- [libbcprov-java]Affected
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
- [libbctls-java]Affected
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
- [libbcutil-java]Affected
Source package: [bouncycastle]
Details (2)
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
1.72-2· all · bookwormAffected
nvd · bouncycastle · debian · bookworm; nvd · bouncycastle · debian · 12
[Debian 13 (Trixie)]
- [libbcjmail-java]Affected
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
- [libbcmail-java]Affected
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
- [libbcpg-java]Affected
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
- [libbcpkix-java]Affected
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
- [libbcprov-java]Affected
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
- [libbctls-java]Affected
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
- [libbcutil-java]Affected
Source package: [bouncycastle]
Details (2)
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
1.80-3· all · trixieAffected
nvd · bouncycastle · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:12267]
- [https://access.redhat.com/errata/RHSA-2026:12269]
- [https://access.redhat.com/errata/RHSA-2026:18054]
- [https://access.redhat.com/errata/RHSA-2026:18055]
- [https://access.redhat.com/errata/RHSA-2026:18059]
- [https://access.redhat.com/errata/RHSA-2026:53644]
- [https://access.redhat.com/errata/RHSA-2026:53645]
- [https://access.redhat.com/errata/RHSA-2026:53646]
- [https://access.redhat.com/security/cve/CVE-2026-5598]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2458635]
- [https://ftp.suse.com/pub/projects/security/]
- [https://github.com/bcgit/bc-java/commit/8692e6b2b191fc4aafa32545c7a78bdb9bf110c5]
- [https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87]
- [https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905598]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-5598]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-5598]
- [https://security-tracker.debian.org/tracker/CVE-2026-5598]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5598.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1608.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]