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VULNERABILITIES

CVE-2026-39823 Details

Description

CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://go.dev/cl/769920 [email protected]Patch
https://go.dev/issue/78913 [email protected]Issue Tracking
https://groups.google.com/g/golang-announce/c/qcCIEXso47M [email protected]Release Notes
https://pkg.go.dev/vuln/GO-2026-4982 [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')[email protected]

Affected Products

ProductVersions
golang go
< 1.25.10
>= 1.26.0, < 1.26.3

CPE

  • cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-39823
NVD Published Date:
May 7, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]