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CVE-2026-110447

Critical9.2CISA KEV — exploited in the wild

Collabora Online – Built-in CODE Server OS Command Injection Vulnerabilityname from 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.

CVSS
9.2v4.0
EPSS (exploit probability)
1.2%69th pct
CISA KEV
Listed

EPSS trendFIRST daily scores, last 90 days

FIRST EPSS held steady from 1.2% on 2026-10-14 to 1.2% on 2026-10-23, ranging 1.2%–1.2% across 10 daily scores.
2026-10-14 → 2026-10-23 · 10 days · 1.2%–1.2%
Daily values
FIRST EPSS daily scores for this CVE
Score dateEPSSPercentile
2026-10-231.2%68.6%
2026-10-221.2%68.6%
2026-10-211.2%68.6%
2026-10-201.2%68.4%
2026-10-191.2%68.4%
2026-10-181.2%68.3%
2026-10-171.2%68.3%
2026-10-161.2%68.3%
2026-10-151.2%68.3%
2026-10-141.2%68.2%

CISA KEV entrycatalogue 2026.10.23

Date added
2026-10-23
Federal due date
2026-10-26
Known ransomware use
Unknown

Required action

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.

Verbatim from the CISA KEV catalogue (CISA KEV, fetched 2026-10-23 21:42 UTC). The due date applies to US federal agencies under BOD 22-01.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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

Learn

Why it happened and what stops it

The weakness (CWE)

How attackers use it (ATT&CK)

Typical for this kind of weakness across CISA KEV exploits (CTID), not specific to this CVE.

Controls that mitigate it (NIST SP 800-53)

Coverage1 article

References

Facts sourced from NVD, FIRST EPSS, and CISA KEV. Last synced 2026-10-23 21:42 UTC.

  • CVSS & description: NVD 2.0, fetched 2026-10-23 20:42 UTC
  • EPSS: FIRST EPSS, fetched 2026-10-23 21:42 UTC; score date 2026-10-23
  • KEV: CISA KEV, fetched 2026-10-23 21:42 UTC