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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: bouncycastle: CVE-2026-5588
Message-ID: <177645002491.1638386.4422423334686240470.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0
Date: Fri, 17 Apr 2026 20:20:24 +0200
Delivered-To: submit@bugs.debian.org

Source: bouncycastle
Version: 1.80-3
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for bouncycastle.

CVE-2026-5588[0]:
| : Use of a Broken or Risky Cryptographic Algorithm vulnerability in
| Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix
| modules).   PKIX draft CompositeVerifier accepts empty signature
| sequence as valid.   This issue affects BC-JAVA: from 1.49 before
| 1.84.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-5588
    https://www.cve.org/CVERecord?id=CVE-2026-5588
[1] https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905588

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]