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High, CVSS 8.7

Statamic vulnerable to privilege escalation via stored cross-site scripting

CVE-2026-28426GHSA-5vrj-wf7v-5wr7

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (statamic/cms 6.4.0, 5.73.11), 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

  • Packagist statamic/cms

    Affected
    < 5.73.11>= 6.0.0-alpha.1, < 6.4.0
    Fixed in
    5.73.11, 6.4.0

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.7 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
EPSS
  • CVE-2026-28426: 0.29% estimated exploitation activity in the next 30 days; percentile 22.02 (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.

Impact Stored XSS vulnerability in svg and icon related components allow authenticated users with appropriate permissions to inject malicious JavaScript that executes when viewed by higher-privileged users. Patches This has been fixed in 5.73.11 and 6.4.0.

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

    Published from ghsa record GHSA-5vrj-wf7v-5wr7

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-2026-28426

Advisory: Statamic vulnerable to privilege escalation via stored cross-site scripting
IDs: CVE-2026-28426, GHSA-5vrj-wf7v-5wr7
Record: https://patchnext.com/advisories/cve-2026-28426 (revision 1, source checked 26 Oct 2026, 14:38 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: statamic/cms 6.4.0, 5.73.11. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist statamic/cms: affected < 5.73.11; >= 6.0.0-alpha.1, < 6.4.0; fixed in 5.73.11, 6.4.0

## Suggested inspection (read-only)
- Packagist statamic/cms: 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 statamic/cms.
- 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-5vrj-wf7v-5wr7 (GitHub-reviewed advisory GHSA-5vrj-wf7v-5wr7 lists affected ranges: Packagist statamic/cms >=0 =6.0.0-alpha.1 <6.4.0)

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