CVE-2026-13575

CVSS 5.6 (medium) · published 2026-11-01

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.

Weakness: CWE-93

Source: NVD CVE-2026-13575

References

• https://github.com/tokuhirom/http-session/commit/58288cbf941da6d2aad4ff5c0c79e523d9e583b4.patch
• https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/Store/CHI.pm
• https://metacpan.org/release/TOKUHIROM/http-session-0.54/changes
• http://www.openwall.com/lists/oss-security/2026/11/01/2

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