CVE-2026-42506

Aliases:GO-2026-5025
Advisory lineage Upstream: 0 Downstream: 31
Analyzed
Published: 22 May 2026, 15:01
Last modified:22 May 2026, 17:45

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
6.1 MEDIUM
v3.1 (cve.org)
EPSS Score
0.19% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 May 2026, 15:01
Published
Vulnerability first disclosed
22 May 2026, 17:45
Last Modified
Vulnerability information updated

Description

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Trends

Current EPSS score: 0.19%• Percentile: 9%

Techniques & Countermeasures

  • CWE-79•Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

    The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Affected Systems

  • golang.org/x•net

    < 0.55.0

  • golang•net

    < 0.55.0

  • golang.org/x/net•golang.org/x/net/html

    < 0.55.0

References (4)