CVE-2026-116566
MEDIUMDescription
socket.getaddrinfo() previously accepted null bytes within *host* and *port* parameters which can cause the values to be silently truncated.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v4 Vector
Exploitability
Impact
CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:P/VC:H/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
Exploit Intelligence
EPSS data unavailable for this CVE.
References
Related Vulnerabilities
Other CWE-158 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-47812 | Critical | 10.0 | 94% | KEV | Fix |
| CVE-2009-1537 | High | 8.8 | 51% | KEV | - |
| CVE-2022-20812 | Critical | 9.0 | 1.9% | - | Fix |
| CVE-2020-14500 | Critical | 10.0 | 1.7% | - | - |
| CVE-2020-7928 | Medium | 6.5 | 1.4% | - | Fix |
| CVE-2022-20813 | Critical | 9.0 | 1.1% | - | Fix |
Common questions
How do I fix CVE-2026-116566?
No published fix for CVE-2026-116566 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
How severe is CVE-2026-116566?
CVE-2026-116566 has a CVSS v4 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-30.