Bug#1135322: libdancer-perl: CVE-2026-5080

[Salvatore Bonaccorso]

Source: libdancer-perl
Version: 1.3522-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libdancer-perl.

CVE-2026-5080[0]:
| Dancer::Session::Abstract versions through 1.3522 for Perl generates
| session ids insecurely.  The session id is generated from summing
| the character codepoints of the absolute pathname with the process
| id, the epoch time and calls to the built-in rand() function to
| return a number between 0 and 999-billion, and concatenating that
| result three times.  The path name might be known or guessed by an
| attacker, especially for applications known to be written using
| Dancer with standard installation locations.  The epoch time can be
| guessed by an attacker, and may be leaked in the HTTP header.  The
| process id comes from a small set of numbers, and workers may have
| sequential process ids.  The built-in rand() function is seeded with
| 32-bits and is considered unsuitable for security applications.
| Predictable session ids could allow an attacker to gain access to
| systems.


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-2026-5080
    https://www.cve.org/CVERecord?id=CVE-2026-5080
[1] https://lists.security.metacpan.org/cve-announce/msg/39488574/

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore