CVE-2026-13575

Unknown

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.

SeverityUnknown

CVSS—

Exploit probability—

ProductHttp-session

PublishedNov 1, 2026

First seenNov 4, 2026

Weakness typeCWE-93CWE-93

How to fix

Update

http-session0.54 or later

Patches

github.com/tokuhirom/http-session/commit/58288cbf941da6d2aad4ff5c0c79e523d9e583b4.patch

Vendor advisories

metacpan.org/release/TOKUHIROM/http-session-0.54/changes

Affected products

Product	Affected versions	Fixed in
http-session	v < 0.54	0.54

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