EUVD-2026-26369CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
6DescriptionNVD
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.
AnalysisAI
Dancer::Session::Abstract through version 1.3522 generates cryptographically weak session identifiers by combining predictable inputs (file path, process ID, epoch time) with an insufficiently-seeded Perl rand() function, allowing remote attackers to predict valid session IDs and hijack user sessions without authentication. The vulnerability affects Perl-based web applications using Dancer framework's default session handling; active exploitation is not confirmed but the attack requires only guessing a session ID, making it practically exploitable.
Sign in for full analysis, threat intelligence, and remediation guidance.
Share
External POC / Exploit Code
Leaving vuln.today