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Medium, CVSS 5.9amended

node-fetch Inefficient Regular Expression Complexity

CVE-2022-2596GHSA-vp56-6g26-6827

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (node-fetch 3.2.10), 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

  • npm node-fetch

    Affected
    >= 3.0.0, < 3.2.10
    Fixed in
    3.2.10

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.9 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
  • CVE-2022-2596: 1.34% estimated exploitation activity in the next 30 days; percentile 71.25 (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.

node-fetch is a light-weight module that brings window.fetch to node.js. Affected versions of this package are vulnerable to Regular Expression Denial of Service (ReDoS) in the isOriginPotentiallyTrustworthy() function in referrer.js, when processing a URL string with alternating letters and periods, such as 'http://' + 'a.a.'.repeat(i) + 'a'.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-vp56-6g26-6827

  2. Revision 1 · created ·

    Published from osv record GHSA-vp56-6g26-6827

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2022-2596

Advisory: node-fetch Inefficient Regular Expression Complexity
IDs: CVE-2022-2596, GHSA-vp56-6g26-6827
Record: https://patchnext.com/advisories/cve-2022-2596 (revision 2, source checked 26 Oct 2026, 12:22 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: node-fetch 3.2.10. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm node-fetch: affected >= 3.0.0, < 3.2.10; fixed in 3.2.10

## Suggested inspection (read-only)
- `npm ls node-fetch --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## 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 node-fetch.
- 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://osv.dev/vulnerability/GHSA-vp56-6g26-6827 (OSV record GHSA-vp56-6g26-6827 lists affected ranges: npm node-fetch >=3.0.0 <3.2.10 (fixed))
- Verified: https://github.com/advisories/GHSA-vp56-6g26-6827 (GitHub-reviewed advisory GHSA-vp56-6g26-6827 lists affected ranges: npm node-fetch >=3.0.0 <3.2.10)

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