CVE-2026-39823

MEDIUM EPSS 23.1%
Published May 7, 20261mo ago · Modified Jun 17, 20261w ago
6.1 CVSS 3.1
Medium
Find Similar
Published May 7, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
23.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 2

VendorProductVersionRange
golanggo* <1.25.10
golanggo*≥1.26.0  –  <1.26.3

References 4

  • go.dev https://go.dev/cl/769920
    Patch
  • go.dev https://go.dev/issue/78913
    Issue Tracking
  • groups.google.com https://groups.google.com/g/golang-announce/c/qcCIEXso47M
    Release Notes
  • pkg.go.dev https://pkg.go.dev/vuln/GO-2026-4982
    Vendor Advisory

Remediation

  • go.dev https://go.dev/cl/769920
    Patch