CPANSec Discloses Legacy HTTP::Session Memcached Command Injection
Tech GuruQuick Answer
Identify pre-0.43 HTTP::Session deployments using the Memcached store. Apply the advisory fix and plan migration from the deprecated distribution to a supported session implementation.
Confirm Scope And Apply The Supported Remediation
What to do now: Identify Perl applications, deployed HTTP::Session versions, configured stores, session-cookie handling and cache ownership. Confirm the Memcached backend and client-controlled session-ID path; do not extend this CVE to every session store or all memcached clients. CPANSec identifies 0.43 or later for this issue and notes additional fixes in deprecated 0.54. Plan a tested migration, with Plack::Middleware::Session cited by the authority as an alternative. Test session creation, expiry, authentication continuity and invalid-ID rejection. Preserve version records, store configuration and migration test evidence.
Last verified: 2026-11-14 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | HTTP::Session Perl distribution using HTTP::Session::Store::Memcached |
|---|---|
| Advisory | CVE-2011-10042 |
| CVE | CVE-2011-10042 |
| Authoritative release date | 2026-11-14 13:57 UTC — CPANSec advisory, published to minute precision. The 0.43 software fix dates to 2011-02-20. |
| Authority revision date | No separate advisory revision date is supplied. |
| Affected versions | HTTP::Session before 0.43 when the Memcached store passes client-controlled session identifiers to memcached. |
| Fixed version | HTTP::Session 0.43 or later fixes this CVE; 0.54 includes additional fixes but is deprecated. |
| CVSS base score | Not provided by the authority |
| CVSS severity | Not provided by the authority |
| Exploitation status | The CPANSec announcement does not confirm exploitation in the wild.; no exploitation claim is inferred. |
What Changed
The November 14 CPANSec advisory identifies command injection through unsanitized session IDs used as memcached keys. Its timeline dates the 0.43 protection to February 20, 2011 and marks 0.54 deprecated in June 2026.
What To Validate Now
- Inventory. Identify Perl applications, deployed HTTP::Session versions, configured stores, session-cookie handling and cache ownership.
- Establish applicability. Confirm the Memcached backend and client-controlled session-ID path; do not extend this CVE to every session store or all memcached clients.
- Remediate. CPANSec identifies 0.43 or later for this issue and notes additional fixes in deprecated 0.54. Plan a tested migration, with Plack::Middleware::Session cited by the authority as an alternative.
- Validate. Test session creation, expiry, authentication continuity and invalid-ID rejection. Preserve version records, store configuration and migration test evidence.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
This is a new advisory for an old flaw, not a newly released patch. Session-store changes can invalidate active sessions; coordinate rollout and rollback. Version 0.43 alone does not establish coverage of other known issues.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
