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High, CVSS 7.4

Pingora has a Request Smuggling Vulnerability

CVE-2025-4366GHSA-93c7-7xqw-w357

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (pingora-core 0.5.0), 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 4.0
7.4 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N · score source
EPSS
  • CVE-2025-4366: 0.54% estimated exploitation activity in the next 30 days; percentile 45.26 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

A request smuggling vulnerability identified within Pingora’s proxying framework, pingora-proxy, allows malicious HTTP requests to be injected via manipulated request bodies on cache HITs, leading to unauthorized request execution and potential cache poisoning. Fixed in https://github.com/cloudflare/pingora/commit/fda3317ec822678564d641e7cf1c9b77ee3759ff Impact The issue could lead to request smuggling in cases where Pingora’s proxying framework, pingora-proxy, is used for caching allowing an attacker to manipulate headers and URLs in subsequent requests made on the same HTTP/1.1 connection.

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

    Published from ghsa record GHSA-93c7-7xqw-w357

Agent brief

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# Patch Next advisory brief: CVE-2025-4366

Advisory: Pingora has a Request Smuggling Vulnerability
IDs: CVE-2025-4366, GHSA-93c7-7xqw-w357
Record: https://patchnext.com/advisories/cve-2025-4366 (revision 1, source checked 26 Oct 2026, 15:38 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pingora-core 0.5.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- crates.io pingora-core: affected < 0.5.0; fixed in 0.5.0

## Suggested inspection (read-only)
- crates.io pingora-core: 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 pingora-core.
- 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-93c7-7xqw-w357 (GitHub-reviewed advisory GHSA-93c7-7xqw-w357 lists affected ranges: crates.io pingora-core >=0 <0.5.0)

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