CVE-2026-39823

medium

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.

References

https://pkg.go.dev/vuln/GO-2026-4982

https://groups.google.com/g/golang-announce/c/qcCIEXso47M

https://go.dev/issue/78913

https://go.dev/cl/769920

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28424

Details

Source: Mitre, NVD

Published: 2026-05-07

Updated: 2026-10-26

Named Vulnerability: GO-2026-4982Named Vulnerability: GHSA-2283-wf8c-rw8r

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

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

Severity: Medium

EPSS

EPSS: 0.00314