Live › vulnerability › CVE-2026-13575
HTTP::Session before 0.54 passes the session id from a client's cookie unchanged into the CHI cache store. With a memcached driver, line break characters in that id let an attacker send extra memcached commands.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-11-01 11:49 UTC. All times on this page are UTC.
Applications that use HTTP::Session with the CHI session store backed by memcached are exposed, because the session id from the cookie reaches memcached without filtering. Applications using the Memcached store, which rejects control characters, or other stores are not affected by this description. Teams not running Perl web applications can skip it.
No product ranges from the sources yet.
0.54 (for example with perl -MHTTP::Session -e 'print $HTTP::Session::VERSION').0.54 or later.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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