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High, CVSS 7.5

Zend-HTTP URL Rewrite vulnerability

GHSA-cg8w-5jrc-675g

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (zendframework/zend-http 2.8.1), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

zend-diactoros (and, by extension, Expressive), zend-http (and, by extension, Zend Framework MVC projects), and zend-feed (specifically, its PubSubHubbub sub-component) each contain a potential URL rewrite exploit. In each case, marshaling a request URI includes logic that introspects HTTP request headers that are specific to a given server-side URL rewrite mechanism. When these headers are present on systems not running the specific URL rewriting mechanism, the logic would still trigger, allowing a malicious client or proxy to emulate the headers to request arbitrary content.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-cg8w-5jrc-675g

Agent brief

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# Patch Next advisory brief: GHSA-cg8w-5jrc-675g

Advisory: Zend-HTTP URL Rewrite vulnerability
IDs: GHSA-cg8w-5jrc-675g
Record: https://patchnext.com/advisories/ghsa-cg8w-5jrc-675g (revision 1, source checked 26 Oct 2026, 14:25 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: zendframework/zend-http 2.8.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist zendframework/zend-http: affected >= 1.0.0, < 2.8.1; fixed in 2.8.1

## Suggested inspection (read-only)
- Packagist zendframework/zend-http: 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/zend-http.
- 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-cg8w-5jrc-675g (GitHub-reviewed advisory GHSA-cg8w-5jrc-675g lists affected ranges: Packagist zendframework/zend-http >=1.0.0 <2.8.1)

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