CVE-2026-39823

6.1 MEDIUM
Published: May 07, 2026 Modified: May 13, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
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

Patch Vendor Advisory Exploit Third Party Advisory
https://go.dev/cl/769920
Source: security@golang.org
Patch
https://go.dev/issue/78913
Source: security@golang.org
Issue Tracking
https://groups.google.com/g/golang-announce/c/qcCIEXso47M
Source: security@golang.org
Release Notes
https://pkg.go.dev/vuln/GO-2026-4982
Source: security@golang.org
Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.1 / 10.0
EPSS (Exploit Probability)
0.3%
23th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

golang