Vulnerability details

CVE-2026-114713

Actively exploited

UnrealIRCd UnrealIRCd

CVSS 3.1

8.6High

Remedy

Required action (CISA): 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. (due: 2026-11-16)

Versions not listed as affected in the CVE record:

UnrealIRCd — version 6.2.7.1 and later

Remedy in the CVE record (record published by: mitre)

Upgrade to UnrealIRCd 6.2.7.1 or later. Alternatively, apply the hot-patch to fix the issue without restart: ./unrealircd hot-patch bundle-20261107

Workaround: Add the following line to the configuration file of all servers until the patch or upgrade is applied: blacklist-module "labeled-response";

Official 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.

CVSS scores

Score	Version	Source	Vector
8.6High	3.1	CVEProject cvelistV5 (CNA) (mitre)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N`

Affected products

Vendor	Product	Versions	Source
UnrealIRCd	UnrealIRCd	v < 6.2.7.1	CVEProject cvelistV5 (CNA)

References and advisories

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Details

Published: 2026-11-08
Last updated: 2026-11-14
State: Published
Assigner (CNA): mitre
Kolun priority: 64 · High

CISA KEV catalog

Date added: 2026-11-13
Due date: 2026-11-16
Used in ransomware: Unknown

Exploit prediction (EPSS)

0.5%

Probability of exploitation in 30 days

43.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Active
Technical impact: Total

Weaknesses (CWE)

CWE-140
Improper Neutralization of Delimiters