CVE-2026-27136

Aliases:GO-2026-5030
Advisory lineage Upstream: 0 Downstream: 35
Analyzed
Published: 22 May 2026, 15:01
Last modified:22 May 2026, 16:59

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
6.1 MEDIUM
v3.1 (cve.org)
EPSS Score
0.18% 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, 16:59
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: 0.18%• Percentile: 8%

Techniques & Countermeasures

  • CWE-1021•Improper Restriction of Rendered UI Layers or Frames

    The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain.

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)