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TI-2026-02811 Aliases CVE-2026-3256GHSA-mx9c-4xjq-mhj6

HTTP::Session versions before 0.54 for Perl defaults to using insecurely generated…

Priority MEDIUM 50CWE-338Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0054 45th percentileScored 2026-11-07
Fix Fixed HTTP::Session (KTAT): 0.54

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
KTATHTTP::Sessionbefore 0.540.54Patch availableCNA
  • HTTP::Session VendorKTAT Affected before 0.54 Fixed in 0.54 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ktat:http\:\:session:*:*:*:*:*:perl:*:* sessionVulnerableKTAT
  • cpe:2.3:a:ktat:http\:\:session:*:*:*:*:*:perl:*:* Versions session Vulnerable ·KTAT

Remediation

  • Fix · CNA HTTP::Session (KTAT) Fixed in 0.54

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3256
  2. 2026-10-03 Alias added: GHSA-mx9c-4xjq-mhj6
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 2

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences