Vulnerability details
CVE-2026-90668
UnrealIRCd UnrealIRCd
CVSS 4.0
8.7High
Official 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).
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (mitre) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A/RE:L |
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (mitre) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| UnrealIRCd | UnrealIRCd | 6.0.5 ≤ v < 6.2.7 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-09-13
- Last updated
- 2026-09-14
- State
- Published
- Assigner (CNA)
- mitre
Exploit prediction (EPSS)
0.58%
Probability of exploitation in 30 days
47.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-770Allocation of Resources Without Limits or Throttling