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6.5

Helm can exhaust memory with a malicious chart file

CVE-2025-32386 · published 1 year ago
Summary

Helm, the chart management tool, may run out of memory and stop if it processes a chart archive that expands to a size far larger than its compressed form. This can happen when an attacker provides a specially crafted chart file. Upgrade Helm to version 3.17.3 or later to prevent the issue.

What to do
  • Update helm.sh helm to version 3.17.3.
  • Update helm helm to version 3.17.3 or later.
Affected software
Ecosystem VendorProductAffected versions
go helm.sh helm < 3.17.3
Fix: upgrade to 3.17.3
– helm helm < 3.17.3
cpe:2.3:a:helm:helm:*:*:*:*:*:*:*:*
Ubuntu:16.04:LTS canonical helm All versions
Original advisory text
Helm Allows A Specially Crafted Chart Archive To Cause Out Of Memory Termination
Helm is a tool for managing Charts. A chart archive file can be crafted in a manner where it expands to be significantly larger uncompressed than compressed (e.g., >800x difference). When Helm loads this specially crafted chart, memory can be exhausted causing the application to terminate. This issue has been resolved in Helm v3.17.3.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
6.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-770Allocation of Resources Without Limits
CWE-789Memory Allocation with Excessive Size Value
Timeline
Published9 Apr 2025
Updated4 Nov 2026
First seen6 Mar 2026
Sources
GHSA-4hfp-h4cw-hj8p · GHSA
CVE-2025-32386 · NVD
UBUNTU-CVE-2025-32386 · OSV
CVE-2025-32386 · OSV
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