CVE-2026-39836: CWE-248: Uncaught Exception in Go standard library net
CVE-2026-39836 is a vulnerability in the Go standard library's net package where the Dial and LookupPort functions panic on Windows when given input containing a NUL (0) character. This uncaught exception can cause the application to crash unexpectedly. The issue affects Go versions up to 1. 26. 0-0. There is no confirmed patch or official remediation available at this time, and no known exploits in the wild have been reported.
AI Analysis
Technical Summary
The vulnerability CVE-2026-39836 involves the Dial and LookupPort functions in the Go standard library's net package. When these functions receive input containing a NUL (0) character on Windows platforms, they trigger a panic due to an uncaught exception (CWE-248). This behavior can lead to application crashes. The affected versions include Go releases up to 1.26.0-0. No CVSS score or vendor advisory detailing a fix is currently available.
Potential Impact
The impact of this vulnerability is an application crash caused by an uncaught exception when processing malformed input containing a NUL character on Windows. This could lead to denial of service conditions in applications using the affected functions. There are no reports of exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, developers should avoid passing inputs containing NUL characters to the Dial and LookupPort functions on Windows or implement input validation to prevent such inputs from reaching these functions.
CVE-2026-39836: CWE-248: Uncaught Exception in Go standard library net
Description
CVE-2026-39836 is a vulnerability in the Go standard library's net package where the Dial and LookupPort functions panic on Windows when given input containing a NUL (0) character. This uncaught exception can cause the application to crash unexpectedly. The issue affects Go versions up to 1. 26. 0-0. There is no confirmed patch or official remediation available at this time, and no known exploits in the wild have been reported.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-39836 involves the Dial and LookupPort functions in the Go standard library's net package. When these functions receive input containing a NUL (0) character on Windows platforms, they trigger a panic due to an uncaught exception (CWE-248). This behavior can lead to application crashes. The affected versions include Go releases up to 1.26.0-0. No CVSS score or vendor advisory detailing a fix is currently available.
Potential Impact
The impact of this vulnerability is an application crash caused by an uncaught exception when processing malformed input containing a NUL character on Windows. This could lead to denial of service conditions in applications using the affected functions. There are no reports of exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, developers should avoid passing inputs containing NUL characters to the Dial and LookupPort functions on Windows or implement input validation to prevent such inputs from reaching these functions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Go
- Date Reserved
- 2026-04-07T18:13:03.529Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fcf0c1cbff5d86102bd5dd
Added to database: 5/7/2026, 8:06:25 PM
Last enriched: 5/7/2026, 8:21:43 PM
Last updated: 5/7/2026, 9:07:03 PM
Views: 3
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