CVE-2026-90668
Last modified
CVE-2026-90668 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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)..
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).
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| UnrealIRCd | UnrealIRCd | >= 6.0.5, < 6.2.7 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-90668?
How severe is CVE-2026-90668?
How do I fix CVE-2026-90668?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-9064A flaw was found in 389-ds-base. The get_ldapmessage_control…7.5
- CVE-2026-90647ASE/Kalkitech ASE2000 V2 Communication Test Set 2.35 through…7.4
- CVE-2026-90648wasm2c in WebAssembly wabt through 1.0.41 allows sandbox esc…7.1
- CVE-2026-9065SureCart version prior to 4.2.1 are vulnerable to authentica…9.3
- CVE-2026-90651Socket Firewall (socketdev/socket-registry-firewall) in regi…8.1
- CVE-2026-9066The WP Compress WordPress plugin before 7.10.04 does not va…6.1
- CVE-2026-9067The Schema & Structured Data for WP & AMP WordPress plugin b…9.1
- CVE-2026-9071IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSph…7.5
- CVE-2026-9072IBM WebSphere Application Server and IBM WebSphere Applicati…9.8
- CVE-2026-9073A flaw was found in foreman-mcp-server. This component utili…6.2
- CVE-2026-9074IBM API Connect 10.0.8.0 through 10.0.8.9 and 12.1.0.0 throu…9.8
- CVE-2026-9076Issue summary: When CMS password-based decryption (RFC 3211 …7.5
Are you affected by CVE-2026-90668?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST