Zend Framework XXE Vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

not scored

EPSS

• CVE-2012-5657: 1.70% estimated exploitation activity in the next 30 days; percentile 77.31 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

The (1) ZendFeedRss and (2) ZendFeedAtom classes in ZendFeed in Zend Framework 1.11.x before 1.11.15 and 1.12.x before 1.12.1 allow remote attackers to read arbitrary files, send HTTP requests to intranet servers, and possibly cause a denial of service (CPU and memory consumption) via an XML External Entity (XXE) attack.

Published by the source

17 May 2022, 05:10 UTC

Last modified by the source

12 Jan 2024, 19:41 UTC

Source last checked

26 Oct 2026, 14:14 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-9m5v-vq4f-mrvf

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# Patch Next advisory brief: CVE-2012-5657

Advisory: Zend Framework XXE Vulnerability
IDs: CVE-2012-5657, GHSA-9m5v-vq4f-mrvf
Record: https://patchnext.com/advisories/cve-2012-5657 (revision 1, source checked 26 Oct 2026, 14:14 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: zendframework/zendframework1 1.12.1, 1.11.15. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist zendframework/zendframework1: affected < 1.11.15; >= 1.12.0-rc1, < 1.12.1; fixed in 1.11.15, 1.12.1

## Suggested inspection (read-only)
- Packagist zendframework/zendframework1: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on zendframework/zendframework1.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-9m5v-vq4f-mrvf (GitHub-reviewed advisory GHSA-9m5v-vq4f-mrvf lists affected ranges: Packagist zendframework/zendframework1 >=0 =1.12.0-rc1 <1.12.1)

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