PT-2026-28439 · Unknown · Http::Session

Published 2026-03-28 · Updated 2026-03-29 · CVE-2026-3256

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions HTTP::Session versions through 0.53

Description HTTP::Session for Perl, by default, uses insecurely generated session IDs. The software utilizes HTTP::Session::ID::SHA1 to create session IDs, employing a SHA-1 hash seeded with the built-in rand function, the epoch time, and the process ID (PID). The PID originates from a limited range of numbers, and the epoch time may be predictable. The rand function is not suitable for cryptographic purposes. The distribution also includes HTTP::Session::ID::MD5, which exhibits a similar flaw but uses the MD5 hash instead.

Recommendations Update to a version of HTTP::Session greater than 0.53.

Fix

Weakness Enumeration

CWE-340

CWE-338

Related Identifiers

CVE-2026-3256

Affected Products

Http::Session

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-3256 · Security Note
• https://twitter.com/oss_security/status/2038092195316547871 · Twitter Post
• http://openwall.com/lists/oss-security/2026/03/28/5 · Note
• https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/SHA1.pm · Note
• https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/MD5.pm · Note
• https://twitter.com/CVEnew/status/2038135164128366714 · Twitter Post
• https://security.metacpan.org/docs/guides/random-data-for-security.html · Note