CVE-2026-0865
MEDIUMCVSS 5.9/10EPSS 0.46%
Last modified
CVE-2026-0865 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. User-controlled header names and values containing newlines can allow injecting HTTP headers.. EPSS estimates a 0.46% chance of exploitation in the next 30 days.
Description
User-controlled header names and values containing newlines can allow injecting HTTP headers.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-0865?
User-controlled header names and values containing newlines can allow injecting HTTP headers.
How severe is CVE-2026-0865?
CVE-2026-0865 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.
How do I fix CVE-2026-0865?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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.
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Are you affected by CVE-2026-0865?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST