Bouncy Castle for Java FIPS: Mehrere Schwachstellen ermöglichen Denial of Service
WID-SEC-2026-2709 · first 10.08.2026 · updated 10.08.2026 · CVSS 7,5
What it is about
Bouncy Castle ist eine Kryptographie-API für Java. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Bouncy Castle for Java FIPS ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Open Source Bouncy Castle for Java FIPS (BC-FJA) <2.1.3
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Bouncy Castle for Java FIPS (BC-FJA) 2.1.3
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- GitHub Security Advisory GHSA-v6w3-qrh8-qccc vom 2026-08-09 github.com
- GitHub Security Advisory GHSA-98J2-6V39-78W8 vom 2026-08-09 github.com
CVE: CVE-2026-13505, CVE-2026-8798
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.