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High, CVSS 7.1amended

HAXcms createSite SSRF Enables Arbitrary File Read

CVE-2026-46393GHSA-q862-gcgq-5m6g

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (@haxtheweb/haxcms-nodejs 26.0.0), 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
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2026-46393: 0.24% estimated exploitation activity in the next 30 days; percentile 14.94 (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.

Summary An authenticated Server-Side Request Forgery (SSRF) vulnerability in HAXcms allows users to fetch arbitrary internal or local resources and write the responses to a web-accessible directory, enabling arbitrary file read and internal network access. Details The createSite endpoint in HAXcms (v11.0.6) accepts a build.files parameter that allows an authenticated user to supply arbitrary URLs or local file paths. This input is processed without validation and ultimately fetched server-side using filegetcontents(). The data flow is as follows: - User input (build.files) is processed via objecttoarray() into a PHP array - Assigned to $filesToDownload in Operations.php (line 2626) - Iterated over in Operations.php (line 2730), where each entry is passed to HAXCMSFile::save() with bulk-import enabled In HAXCMSFile.php (line 30), the following occurs: Here, tmpname is attacker-controlled and may contain: - External URLs (http://attacker.com) - Internal services (http://127.0.0.1) -…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-q862-gcgq-5m6g

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-q862-gcgq-5m6g

Agent brief

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# Patch Next advisory brief: CVE-2026-46393

Advisory: HAXcms createSite SSRF Enables Arbitrary File Read
IDs: CVE-2026-46393, GHSA-q862-gcgq-5m6g
Record: https://patchnext.com/advisories/cve-2026-46393 (revision 3, source checked 26 Oct 2026, 12:53 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @haxtheweb/haxcms-nodejs 26.0.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @haxtheweb/haxcms-nodejs: affected <= 25.0.0; fixed in 26.0.0

## Suggested inspection (read-only)
- `npm ls @haxtheweb/haxcms-nodejs --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 @haxtheweb/haxcms-nodejs.
- 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-q862-gcgq-5m6g (OSV record GHSA-q862-gcgq-5m6g lists affected ranges: npm @haxtheweb/haxcms-nodejs >=0 <26.0.0 (fixed))
- Verified: https://github.com/advisories/GHSA-q862-gcgq-5m6g (GitHub-reviewed advisory GHSA-q862-gcgq-5m6g lists affected ranges: npm @haxtheweb/haxcms-nodejs >=0 <=25.0.0)

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