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6.1

containerd may create incorrect web page structure

published 1 month ago
Summary

The containerd software can mishandle web page code it processes, building an unexpected document layout when displayed. This can cause pages to look wrong or allow unwanted content to appear, which may affect user confidence and downstream applications. Apply the latest containerd update or follow the vendor’s guidance to fix the issue.

What to do
  • Update cleanstart containerd to version 2.1.3-r3.
Affected software
Ecosystem VendorProductAffected versions
CleanStart cleanstart containerd < 2.1.3-r3
Fix: upgrade to 2.1.3-r3
Original advisory text
Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree
Security vulnerability affects the containerd package. Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
6.1 Medium
Timeline
Published30 Sep 2026
Updated1 Oct 2026
First seen1 Oct 2026
Sources
CLEANSTART-2026-OH56215 · OSV
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