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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Sun, 01 Nov 2026 11:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | HTTP::Session versions before 0.54 for Perl allow memcached command injection via unfiltered session ids in HTTP::Session::Store::CHI | |
| Weaknesses | CWE-93 | |
| References |
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Status: PUBLISHED
Assigner: CPANSec
Published: 2026-11-01T10:46:36.389Z
Updated: 2026-11-01T10:46:36.389Z
Reserved: 2026-06-28T20:29:06.153Z
Link: CVE-2026-13575
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