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CVE-2026-110447

9.2 critical KEV · due 2026-10-26 exploit SSVC exploitation: active Analyzed
NVD · CVE.org · CISA KEV

Collabora Online Built-in CODE Server before 26.4.303 (richdocumentscode), a Nextcloud app, allows remote code execution, as exploited in the wild in September and October 2026, a different vulnerability than CVE-2025-66208. This is an OS command injection in proxy.php when the CODE server isn't running (e.g., the product was recently restarted). The vulnerability is not present in standalone Collabora Online servers; only this deployment with CODE Server is affected.

Fix

Public exploits 1

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

CISA KEV required action · due 2026-10-26

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Added to the catalog 2026-10-23. CISA KEV

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

In the news 5

Change history 8

  1. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-26 16:48
  2. StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-26 16:48
  3. StatusDeferred → Undergoing AnalysisNVD modified 2026-10-26 12:01
  4. EPSS0.02 → 0.12
  5. References+1 references (now 3)NVD modified 2026-10-23 20:17
  6. CISA KEVadded to CISA KEV, due 2026-10-26
  7. StatusReceived → DeferredNVD modified 2026-10-16 19:56
  8. First seenCVSS 9.2NVD modified 2026-10-14 19:17

Affected (CPE criteria) 1

  • cpe:2.3:a:collabora:online:*:*:*:*:*:nextcloud:*:*

References 3