CVE-2026-114713

EUVD-2026-119377
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
8.6 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 21.99%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
unrealircdunrealircd
𝑥
< 6.2.7.1
CNA
Common Weakness Enumeration
References
https://forums.unrealircd.org/viewtopic.php?t=9487
https://www.unrealircd.org/
https://www.unrealircd.org/index/news
http://www.openwall.com/lists/oss-security/2026/11/08/1