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TI-2026-00673 Aliases CVE-2026-0895GHSA-ggff-9mj3-7246

Insecure Deserialization in extension "Mailqueue" (mailqueue)

Priority LOW 23CWE-502Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

The extension extends TYPO3’ FileSpool component, which was vulnerable to Insecure Deserialization prior to TYPO3-CORE-SA-2026-004 https://typo3.org/security/advisory/typo3-core-sa-2026-004 . Since the related fix is overwritten by the extension, using the extension with a patched TYPO3 core version still allows for Insecure Deserialization, because the affected vulnerable code was extracted from TYPO3 core to the extension. More information about this vulnerability can be found in the related TYPO3 Core Security Advisory TYPO3-CORE-SA-2026-004 https://typo3.org/security/advisory/typo3-core-sa-2026-004 .

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00149 4th percentileScored 2026-11-07
Fix Fixed Extension "Mailqueue" (TYPO3): 0.4.3, 0.5.1cpsit/typo3-mailqueue (Packagist): 0.4.3, 0.5.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
TYPO3Extension "Mailqueue"before 0.4.3; 0.5.0 to before 0.5.10.4.3, 0.5.1Patch availableCNA
—cpsit/typo3-mailqueue (Packagist)before 0.4.30.4.3Patch availableGHSA-ggff-9mj3-7246
—cpsit/typo3-mailqueue (Packagist)0.5.0 to before 0.5.10.5.1Patch availableGHSA-ggff-9mj3-7246
  • Extension "Mailqueue" VendorTYPO3 Affected before 0.4.3; 0.5.0 to before 0.5.1 Fixed in 0.4.3, 0.5.1 Patch available CNA
  • cpsit/typo3-mailqueue (Packagist) Vendor— Affected before 0.4.3 Fixed in 0.4.3 Patch available GHSA-ggff-9mj3-7246
  • cpsit/typo3-mailqueue (Packagist) Vendor— Affected 0.5.0 to before 0.5.1 Fixed in 0.5.1 Patch available GHSA-ggff-9mj3-7246

Remediation

  • Fix · CNA Extension "Mailqueue" (TYPO3) Fixed in 0.4.3, 0.5.1
  • Fix · GHSA-ggff-9mj3-7246 cpsit/typo3-mailqueue (Packagist) Fixed in 0.4.3 Advisory →
  • Fix · GHSA-ggff-9mj3-7246 cpsit/typo3-mailqueue (Packagist) Fixed in 0.5.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-0895
  2. 2026-10-03 Alias added: GHSA-ggff-9mj3-7246

References

Patch 2

Advisory 2

Other 2

  • TI-2023-10314 Persisted Cross-Site Scripting in Frontend Rendering in typo3 CVSS 3.1HIGH 8.8
  • TI-2010-03538 The jumpUrl (aka access tracking) implementation in tslib/class.tslib_fe.php in TYPO3… CVSS 2.0HIGH 7.1
  • TI-2009-00775 The jumpUrl mechanism in class.tslib_fe.php in TYPO3 3.3.x through 3.8.x, 4.0 before… CVSS 2.0MEDIUM 5.0
  • TI-2025-30547 The sr_feuser_register extension through 12.4.8 for TYPO3 allows Remote Code Execution. CVSS 3.1CRITICAL 10.0
  • TI-2019-08867 The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before… CVSS 3.1CRITICAL 9.8
  • TI-2008-04019 Unspecified vulnerability in the TYPO3 Secure Directory (kw_secdir) extension before… CVSS 2.0HIGH 10.0
See all 411 →

Sources

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