CVE-2026-5598
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS — probability of exploitation (30 days)
1.0%
59.9th percentile
CISA KEV
Not listed
Weakness / dates
CWE-385
Published 2026-04-15 · modified 2026-09-18
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | N | None |
| Availability | N | None |
Timeline
- 2026-04-15 — Published (NVD)
- 2026-09-18 — Last modified (NVD)
Description
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.
References
- 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://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://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5598.json