CVE-2026-114713: UnrealIRCd Improper Neutralization of Delimiters Vulnerability

What should you do?

Patch now

• ExploitedYes, according to CISA KEV
• CISA due date16 Nov 2026
• PatchYes
• Fixed in6.2.7.1
• Affected versionsbefore 6.2.7.1

Affected versions

Product	Affected versions	Fixed in
UnrealIRCd UnrealIRCd	before 6.2.7.1	6.2.7.1

Required action (CISA's text)

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.

Description (NVD)

The labeled-response module in UnrealIRCd 6.0.0 before 6.2.7.1 does not escape the IRCv3 "label" message tag when echoing it into replies, which allows any user on a network with two or more linked servers to inject server-to-server commands that are executed with server authority.

SOURCES

• NVDNVD entry for CVE-2026-114713
• CISA KEVCISA Known Exploited Vulnerabilities catalog

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 13 Nov 2026.