CVE-2026-114713
CVE-2026-114713 is a high-severity vulnerability (CVSS 3.1 base score 8.6). 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. CISA added it to the Known Exploited Vulnerabilities catalog on 2026-11-13, with a remediation due date of 2026-11-16 for US federal civilian agencies. As of 2026-11-14, EPSS estimates a 0.3% probability of exploitation in the next 30 days, in the 23rd percentile of scored CVEs.
Updated
UnrealIRCd Improper Neutralization of Delimiters Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA 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
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.
Key Findings
as of 2026-11-14- CISA added CVE-2026-114713 to the KEV catalog 6 days after its CVE record was published. The median for entries added in 2026 so far is 12 days.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:NOpen in CVSS calculator Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| UnrealIRCd | UnrealIRCd UnrealIRCd | 0 to <6.2.7.1 |
References
4 linksRecord Details
- Published
- 2026-11-08
- Last updated
- 2026-11-14
- Assigner (CNA)
- mitre
- Credited to
- -
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). Alert titles and links from CISA cybersecurity alerts. This site is not affiliated with or endorsed by MITRE, NVD, CISA, or FIRST.