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Server-Side Request Forgery (SSRF)Weakness · CWE-918

CVE-2026-41129

MEDIUM · 5.5 CVSS v4.0 Published 2026-04-22
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
61/100
Remediation priority · Elevated
Remotely reachable Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Craft CMS is a content management system (CMS). Versions on the 4.x branch through 4.17.8 and the 5.x branch through 5.9.14 are vulnerable to Server-Side Request Forgery. The exploitation requires a few permissions to be enabled in the used GraphQL schema: "Edit assets in the <VolumeName> volume" and "Create assets in the <VolumeName> volume." Versions 4.17.9 and 5.9.15 patch the issue.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-918

The server can be induced to make requests to a URL an attacker controls, turning it into a proxy into internal networks and cloud metadata services. It's especially dangerous behind a trusted network boundary. The fix is strict allow-listing of destinations and blocking access to internal address ranges.

General guidance for the server-side request forgery (ssrf) class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
High
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

Craft CMS 4.17.9 (4.x branch) or 5.9.15 (5.x branch)

  1. 1. Backup your Craft CMS database and all files before proceeding with any upgrade
  2. 2. Identify your current Craft CMS version by checking the version file or admin panel
  3. 3. If running on 4.x branch (up to 4.17.8), upgrade to version 4.17.9
  4. 4. If running on 5.x branch (up to 5.9.14), upgrade to version 5.9.15
  5. 5. Use Composer to upgrade: run 'composer require craftcms/cms:^4.17.9' or 'composer require craftcms/cms:^5.9.15' depending on your branch
  6. 6. Run database migrations after upgrade: './craft migrate/all'
  7. 7. Clear caches: './craft clear-caches/all'
  8. 8. Test the GraphQL functionality and verify the SSRF vulnerability is mitigated
Caveat Standard CMS upgrade risks apply - test in staging environment first; review plugin compatibility before upgrading production

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-41129 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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