CVE-2026-39823

MediumCVSS 6.1/10Last modified Oct 26, 2026

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 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

VendorProductVersions
Go standard libraryhtml/template< 1.25.10; >= 1.26.0-0, < 1.26.3

References

Timeline

Published
May 7, 2026
Last modified
Oct 26, 2026
NVD status
Analyzed

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CVE-2026-39823: Medium severity, CVSS 6.1 | Vulnix