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TI-2025-27322 Aliases CVE-2025-40931GHSA-32fg-c88m-mcrv

Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id

Priority MEDIUM 48CWE-338Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

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

Summary

Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id. Apache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 hash seeded with the built-in rand() function, the 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. Predicable session ids could allow an attacker to gain access to systems. Note that the libapache-session-perl package in some Debian-based Linux distributions may be patched to use Crypt::URandom.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00643 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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
CHORNYApache::Session::Generate::MD5up to 1.94—No fix listedCNA
  • Apache::Session::Generate::MD5 VendorCHORNY Affected up to 1.94 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:chorny:apache\:\:session\:\:generate\:\:md5:*:*:*:*:*:perl:*:* session\VulnerableCHORNY
  • cpe:2.3:a:chorny:apache\:\:session\:\:generate\:\:md5:*:*:*:*:*:perl:*:* Versions session\ Vulnerable ·CHORNY

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-40931
  2. 2026-10-03 Alias added: GHSA-32fg-c88m-mcrv
  3. 2026-10-31 EPSS moved to the 50th–90th percentile

References

Patch 1

Advisory 3

Other 6

  • TI-2013-06215 Apache::Session versions through 1.94 for Perl re-creates deleted sessions CVSS 3.1CRITICAL 9.1
  • TI-2026-04436 Apache::Session::Generate::ModUniqueId versions from 1.54 through 1.94 for Perl session… CVSS 3.1CRITICAL 9.1

Sources

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