CVE-2026-3256 | BDVDB-2026-323549 Detail
KTATHTTP::Session
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.
Impact#
CAPEC-115 Authentication Bypass
Weaknesses#
References#
- https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/SHA1.pm
- https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/MD5.pm
- https://security.metacpan.org/docs/guides/random-data-for-security.html
- https://metacpan.org/release/TOKUHIROM/http-session-0.54/changes
- http://www.openwall.com/lists/oss-security/2026/03/28/5
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.