UnrealIRCd up to 6.2.7 labeled-response module injection

Summaryinfo

A vulnerability marked as critical has been reported in UnrealIRCd. The affected element is an unknown function of the component labeled-response module. The manipulation leads to injection. This vulnerability is traded as CVE-2026-114713. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in UnrealIRCd and classified as critical. This issue affects an unknown code of the component labeled-response module. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at unrealircd.org. The identification of this vulnerability is CVE-2026-114713 since 10/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

Upgrading to version 6.2.7.1 eliminates this vulnerability.

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Productinfo

Name

• UnrealIRCd

Version

• 1.4.25
• 3.1.1
• 3.1.3
• 3.2
• 3.2.0 Beta 10
• 3.2.1
• 3.2.2
• 3.2.3
• 3.2.4
• 3.2.5
• 3.2.6
• 3.2.7
• 3.2.8
• 3.2.8.1
• 3.2.10
• 3.2.10.1
• 3.2.10.7
• 4.0.5
• 4.0.6
• 6.1.4
• 6.2.7

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

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