CVEs / CVE-2026-114713
CVE-2026-114713: UnrealIRCd Improper Neutralization of Delimiters Vulnerability
- Known exploited in the CISA KEV catalog since 13 Nov 2026
- high 8.6 CVSS 3.1 (from the CNA)
- EPSS 0.5% chance of exploitation in the next 30 days, higher than 43% of CVEs (14 Nov 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| UnrealIRCd UnrealIRCd | before 6.2.7.1 | 6.2.7.1 |
Exploitation
| In CISA KEV since | 13 Nov 2026 |
|---|---|
| Due date for US federal agencies | 16 Nov 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 8.6 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:NScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-140 |
On the Stackurity blog
References
- CVE-2026-114713 on NVD
- CVE-2026-114713 in the CISA KEV catalog
- https://forums.unrealircd.org/viewtopic.php?t=9487 (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- 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
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-114713
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.