CVE-2026-39836
Panic in Dial and LookupPort when handling NUL byte on Windows in net
HIGH
7.5
CVSS Score
Published: May 7, 2026 at 07:41 PM UTC
Updated: October 26, 2026 at 08:10 PM UTC
2 products affected across 2 vendorsGo.NET
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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit
Description
The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 1.25.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.26.3, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (4)
Issue TrackingMailing List
Source: cverecord
https://groups.google.com/g/golang-announce/c/qcCIEXso47MSSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-476
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