CVE-2026-13575: vulnerability in http-session
HTTP::Session versions before 0.54 for Perl allow memcached command injection via unfiltered session ids in HTTP::Session::Store::CHI
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.9%
HTTP::Session versions before 0.54 for Perl allow memcached command injection via unfiltered session ids in HTTP::Session::Store::CHI.
The session id from the client's cookie reaches the CHI cache unchanged. The sibling HTTP::Session::Store::Memcached rejects ids that contain control characters, but the CHI store has no such check, and CHI does not escape keys for its memcached drivers.
With a memcached driver, a CR and LF in the session id end the cache command early, and the server reads the bytes after them as further commands.
Affected products
http-sessionReferences
https://github.com/tokuhirom/http-session/commit/58288cbf941da6d2aad4ff5c0c79e523d9e583b4.patchhttps://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/Store/CHI.pmhttps://metacpan.org/release/TOKUHIROM/http-session-0.54/changeshttp://www.openwall.com/lists/oss-security/2026/11/01/2