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TI-2026-71028 Aliases CVE-2026-109392GHSA-w844-4xmf-w7mw

Stored cross-site scripting in Pimcore via ExternalImage fields

Priority MEDIUM 56CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Pimcore through 2026.3.1 contains a stored cross-site scripting flaw (CWE-79) in ExternalImage fields, where URLs are saved without escaping. An authenticated backend user with data object edit permission can store crafted values that run JavaScript in the admin origin when other users open version preview or diff views. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Pimcore through 2026.3.1 contains a stored cross-site scripting vulnerability that allows authenticated backend users to inject scripts by storing unescaped URLs in ExternalImage fields. Attackers with data object edit permission can store attribute-breaking payloads that execute JavaScript in the admin origin when other users open version preview or diff views.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00171 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pimcorePimcoreup to 2026.3.1—No fix listedCNA
  • Pimcore Vendorpimcore Affected up to 2026.3.1 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:pimcore:pimcore:*:*:*:*:*:*:*:*——pimcore
  • cpe:2.3:a:pimcore:pimcore:*:*:*:*:*:*:*:* Versions — — ·pimcore

Remediation

The sources list no fixed version for Pimcore.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-109392
  2. 2026-10-12 Alias added: GHSA-w844-4xmf-w7mw
  3. 2026-10-13 CISA SSVC decision points changed
  4. 2026-10-13 Priority changed: LOW → MEDIUM

References

Exploit 1

Other 3

  • TI-2026-18925 Pimcore has a Blind SQL Injection in Admin Search Find API due to an incomplete fix for CVE-2023-30848 CVSS 3.1HIGH 8.8
  • TI-2024-15667 Pimcore Admin Classic Bundle host header injection in the password reset CVSS 3.1HIGH 8.8
  • TI-2026-40161 Pimcore: Remote Code Execution via DataObject Class-Definition Field Name CVSS 3.1CRITICAL 9.9
  • TI-2026-18926 Pimcore ENV Variables and Cookie Informations are exposed in http_error_log CVSS 3.1HIGH 8.6
  • TI-2024-16853 Pimcore Host Header Injection in user invitation link CVSS 3.1CRITICAL 9.3
  • TI-2023-01489 SQL Injection in pimcore/pimcore CVSS 3.1HIGH 8.8
See all 171 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences