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Fencer Vulns
low 3.0

CVE-2020-15187 json

Duplicate plugin entries in Helm

published 2020-09-17 6 y ago modified 2026-09-08 2 mo ago also BIT-helm-2020-15187 , EUVD-2021-1035 , GHSA-c52f-pq47-2r9j

cvss
3.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

In Helm before versions 2.16.11 and 3.3.2, a Helm plugin can contain duplicates of the same entry, with the last one always used. If a plugin is compromised, this lowers the level of access that an attacker needs to modify a plugin's install hooks, causing a local execution attack. To perform this attack, an attacker must have write access to the git repository or plugin archive (.tgz) while being downloaded (which can occur during a MITM attack on a non-SSL connection). This issue has been patched in Helm 2.16.11 and Helm 3.3.2. As a possible workaround make sure to install plugins using a secure connection protocol like SSL.

Patch / fix

  • go helm.sh/helm/v3 3.3.2
  • go helm.sh/helm 2.16.11
  • bitnami helm 2.16.11, 3.3.2
  • helm helm 2.16.11, 3.3.2
  • kubernetes SLE Module for Containers 15 SP1 1.17.13-4.21.2

suse advisories SUSE-SU-2020:3760-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-15187 updated cvss 4.7

helm: write access to the git repository or plugin archive causing causing a local execution attack

  • Red Hat Advanced Cluster Management for Kubernetes 2 helm
    affected: no fix available
  • Red Hat OpenStack Platform 16.2 osp-director-provisioner-container, rhosp-rhel8-tech-preview/osp-director-operator, rhosp-rhel8-tech-preview/osp-director-downloader
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.52% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N
GitHub 3.1 3.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N
NVD 3.1 4.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
OSV 3.1 4.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
go helm.sh/helm/v3
>=3.0.0, <3.3.2
3.3.2
go helm.sh/helm
>=2.0.0, <2.16.11
2.16.11
bitnami helm
>=2.0.0, <2.16.11
>=3.0.0, <3.3.2
2.16.11
3.3.2

Affected products

  • helm helm

Classification

Weakness
  • CWE-694 Use of Multiple Resources with Duplicate Identifier
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.