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.
Published: 2026-11-01
Score: 5.6 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to http-session 0.54 or later.

Tracking

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Advisories

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History

Mon, 09 Nov 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.6, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L'}


Sat, 07 Nov 2026 07:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 02 Nov 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Tokuhirom
Tokuhirom http::session2
Vendors & Products Tokuhirom
Tokuhirom http::session2

Sun, 01 Nov 2026 20:30:00 +0000

Type Values Removed Values Added
References

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

Subscriptions

Tokuhirom Http::session2
cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-11-09T17:04:47.552Z

Reserved: 2026-06-28T20:29:06.153Z

Link: CVE-2026-13575

cve-icon Vulnrichment

Updated: 2026-11-01T20:05:00.738Z

cve-icon NVD

Status : Deferred

Published: 2026-11-01T11:18:58.040

Modified: 2026-11-09T17:17:28.440

Link: CVE-2026-13575

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-09T18:45:12Z

Weaknesses