Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
The webserver in UnrealIRCd 6.0.5 through 6.2.6 before 6.2.7 does not limit the number of HTTP request headers, which allows remote attackers to cause a denial of service (memory consumption and unresponsive server) via an HTTP request with an unlimited number of headers, if a websocket or JSON-RPC listener is enabled (disabled by default).
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
The security issue from yesterday was assigned CVE-2026-90668. Instead of upgrading, admins can simply run: ./unrealircd hot-patch webserver-header-dos We have been doing this for quite a while:
Post summary
The text reports CVE-2026-90668 and directs administrators to apply a hot-patch rather than upgrade. The main takeaway is the availability of a remediation command.
CVE-2026-90668 (CVSS 8.7): UnrealIRCd 6.0.5-6.2.6 webserver vulnerable to remote DoS via unlimited HTTP headers. Update to 6.2.7. https://nvd.nist.gov/vuln/detail/CVE-2026-90668 via NVD Recent High CVSS #CyberSecurity #InfoSec #Vulnerability #AI #MachineLearning https://t.co/zXCuGjJgl6
Post summary
The tweet discloses CVE-2026-90668, a high-severity DoS flaw in UnrealIRCd 6.0.5-6.2.6, and explicitly instructs users to update to version 6.2.7.