---
cve: "CVE-2026-5598"
severity: "HIGH"
cvss: 8.9
epss: "90%"
vendor: "Legion of the Bouncy Castle Inc."
kev: false
exploited: false
published: "2026-04-15 10:16:49"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T04:09:38+02:00"
---

# CVE-2026-5598

> 8.9 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
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/S:P/AU:Y/U:Red
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- d3fbd45fd5e27fbc3a69b8ab150619f0dc8a6a44 (Commit)
- dd0e7f83eef6b5d157139c9da21852d44bfcef71 (Commit)

## Referenzen

- <https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905598>
- <https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87>
- <https://github.com/bcgit/bc-java/commit/8692e6b2b191fc4aafa32545c7a78bdb9bf110c5>
- <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-2026:53806>
- <https://access.redhat.com/security/cve/CVE-2026-5598>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2458635>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-5598) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_