AUGUST 4, 2026
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Case File

CVE-2026-3256

CRITICAL · CVSS 9.8 EPSS 0.53% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-03-28 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
poc

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-3256
Severity
CRITICAL
CVSS
9.8
EPSS
0.53%

Original NVD Description

HTTP::Session versions before 0.54 for Perl defaults to using insecurely generated session ids. HTTP::Session defaults to using HTTP::Session::ID::SHA1 to generate session ids using a SHA-1 hash seeded with the built-in rand function, the high resolution epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. The distribution includes HTTP::session::ID::MD5 which contains a similar flaw, but uses the MD5 hash instead.