CVE-2026-3256
HTTP::Session versions through 0.53 for Perl defaults to using insecurely generated session ids
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
4th
HTTP::Session versions through 0.53 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.
| CWE | CWE-340 CWE-338 |
| Vendor | ktat |
| Product | http::session |
| Published | Mar 28, 2026 |
| Last Updated | Apr 1, 2026 |
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Affected Versions
KTAT / HTTP::Session
0 ≤ 0.53
References
metacpan.org: https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/SHA1.pm metacpan.org: https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/MD5.pm security.metacpan.org: https://security.metacpan.org/docs/guides/random-data-for-security.html openwall.com: http://www.openwall.com/lists/oss-security/2026/03/28/5