What the history shows
The software has recorded 1 CVE with a maximum CVSS score of 8.6, which is included in the Known Exploited Vulnerabilities catalog. This issue impacts the 6.2 release line, with the latest vulnerability reported on 2026-11-08.
How to stay safe
Operators should maintain installations on supported release lines and regularly track software versions to apply security updates promptly.
Affected version lines
Known vulnerabilities
| CVE | Title | Affected versions | CVSS | Exploited | EPSS | Published |
|---|---|---|---|---|---|---|
| CVE-2026-114713 | The labeled-response module in UnrealIRCd 6.0.0 before 6.2.7.1 does not escape the IRCv3 "label" message tag w... | < 6.2.7.1 | 8.6 | KEV | 0.5% | 2026-11-08 |
| CVE-2026-90668 | The webserver in UnrealIRCd 6.0.5 through 6.2.6 before 6.2.7 does not limit the number of HTTP request headers... | ≥ 6.0.5 < 6.2.7 | 8.7 | — | 2026-09-13 | |
| CVE-2016-7144 | The m_authenticate function in modules/m_sasl.c in UnrealIRCd before 3.2.10.7 and 4.x before 4.0.6 allows remo... | * | — | — | 2017-01-19 |
Track these versions on your own servers
InfraGuard collects installed software versions from every server and flags the ones with known vulnerabilities. Self-hosted — nothing leaves your network.
Data: CVE List (CVE® Program), NVD, CISA KEV, FIRST EPSS (see EPSS at https://www.first.org/epss), endoflife.date. Software list: awesome-selfhosted (CC BY-SA 3.0).