CVE WatchNov 14, 2026

CVE-2026-114713

UnrealIRCd Improper Neutralization of Delimiters Vulnerability

CVSS

8.6

High

EPSS

0.3%

p23

KEV

YES

Nov 13, 2026

Exploit Today

0-100

Published: Nov 8, 2026 · Last modified: Nov 14, 2026 · CWE-140

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-11-082026-11-13

KEV catalog record

Product

UnrealIRCd / UnrealIRCd

Vulnerability

UnrealIRCd Improper Neutralization of Delimiters Vulnerability

Added to KEV

Nov 13, 2026

Remediate by

Nov 16, 2026

Known ransomware use

Summary description

UnrealIRCd UnrealIRCd contains an improper neutralization of delimiters vulnerability that allows any user on a network with two or more linked servers to inject server-to-server commands that are executed with server authority.

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.

Notes

https://forums.unrealircd.org/viewtopic.php?t=9487 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-114713

Technical description

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.

Official references

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