6.1

CVE-2026-42506: Invoking incorrect handling of namespaced elements in foreign content in golang.org/x/net/html

Analyzed
AliasesUBUNTU-CVE-2026-42506DEBIAN-CVE-2026-42506CGA-22jg-59v6-6479
Published 22-05-2026Last modified 22-05-2026

Vulnerability summary

CVE-2026-42506 is a medium (CVSS 6.1) vulnerability in golang net. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · -0.10 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 38 · Related 39
OPENSUSE-SU-2026:10856-1OPENSUSE-SU-2026:10923-1OPENSUSE-SU-2026:10930-1OPENSUSE-SU-2026:10941-1OPENSUSE-SU-2026:11013-1OPENSUSE-SU-2026:11126-1

Timeline

  1. 22-05-2026
    PublishedVulnerability first disclosed.
  2. 22-05-2026
    Last modifiedVulnerability 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

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

Decrease -0.10 pp

From 0.33% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard200 products
  • actions-runner-controllerAll versions (No fix recorded)
  • addon-resizerAll versions (No fix recorded)
  • addon-resizer-fipsAll versions (No fix recorded)
  • agentbeatAll versions (No fix recorded)
  • amassAll versions (No fix recorded)

1 vendor · 200 products · Showing 200 of 2250

References

11 links
Show all 11 references