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Fencer Vulns
high 8.0

CVE-2026-1961 json

Forman: foreman: remote code execution via command injection in websocket proxy

published 2026-03-26 7 mo ago modified 2026-11-03 6 d ago also EUVD-2026-16167

cvss
8.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

A flaw was found in Foreman. A remote attacker could exploit a command injection vulnerability in Foreman's WebSocket proxy implementation. This vulnerability arises from the system's use of unsanitized hostname values from compute resource providers when constructing shell commands. By operating a malicious compute resource server, an attacker could achieve remote code execution on the Foreman server when a user accesses VM VNC console functionality. This could lead to the compromise of sensitive credentials and the entire managed infrastructure.

Patch / fix

  • Red Hat Red Hat Satellite 6.16 for RHEL 8 0:3.12.0.14-1.el8sat
  • Red Hat Red Hat Satellite 6.16 for RHEL 9 0:3.12.0.14-1.el9sat
  • Red Hat Red Hat Satellite 6.17 for RHEL 9 0:0.0.3-4.el9sat, 0:0.1.23-0.3.el9pc, 0:0.4.3-1.el9sat, 0:0.13.0-1.el9sat, 0:1.2.0-0.1.el9pc, 0:1.5.1-1.el9sat, 0:2.22.3-1.el9pc, 0:3.14.0.14-1.el9sat, 0:3.27.10-2.el9pc, 0:4.2.28-0.1.el9pc, 0:4.16.0.14-1.el9sat, 0:6.17.7-1.el9sat
  • Red Hat Red Hat Satellite 6.18 for RHEL 9 0:3.16.0.12-1.el9sat
  • foreman satellite utils 6.16, satellite capsule 6.16, satellite 6.16 3.12.0.14-1.el8sat
  • foreman satellite utils 6.16, satellite capsule 6.16, satellite 6.16 3.12.0.14-1.el9sat
  • foreman-cli satellite utils 6.16, satellite 6.16 3.12.0.14-1.el8sat
  • foreman-cli satellite utils 6.16, satellite 6.16 3.12.0.14-1.el9sat
  • foreman-ec2 satellite 6.16 3.12.0.14-1.el8sat
  • foreman-ec2 satellite 6.16 3.12.0.14-1.el9sat
  • foreman-pcp satellite capsule 6.16, satellite 6.16 3.12.0.14-1.el8sat
  • foreman-pcp satellite capsule 6.16, satellite 6.16 3.12.0.14-1.el9sat

red hat advisories RHSA-2026:5971RHSA-2026:5968RHSA-2026:5970

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-2026-1961 updated cvss 8.0

forman: Foreman: Remote Code Execution via command injection in WebSocket proxy

  • Red Hat Satellite 6 foreman, foreman-cli, foreman-ec2, foreman-gce, foreman-ovirt, foreman-vmware, +9 more
    affected: workaround, no fix available
  • Red Hat Satellite 6.16 for RHEL 8 foreman 3.12.0.14-1.el8sat, foreman-cli 3.12.0.14-1.el8sat, foreman-ec2 3.12.0.14-1.el8sat, foreman-pcp 3.12.0.14-1.el8sat, foreman-ovirt 3.12.0.14-1.el8sat, foreman-redis 3.12.0.14-1.el8sat, +8 more Red Hat Satellite 6.16 for RHEL 9 foreman 3.12.0.14-1.el9sat, foreman-cli 3.12.0.14-1.el9sat, foreman-ec2 3.12.0.14-1.el9sat, foreman-pcp 3.12.0.14-1.el9sat, foreman-ovirt 3.12.0.14-1.el9sat, foreman-redis 3.12.0.14-1.el9sat, +8 more
    fixed: vendor fix RHSA-2026:5971
  • Red Hat Satellite 6.17 for RHEL 9 libcomps 0.1.23-0.3.el9pc, satellite 6.17.7-1.el9sat, foreman 3.14.0.14-1.el9sat, python-brotli 1.2.0-0.1.el9pc, satellite-cli 6.17.7-1.el9sat, foreman-cli 3.14.0.14-1.el9sat, +29 more
    fixed: vendor fix RHSA-2026:5970
  • Red Hat Satellite 6.18 for RHEL 9 foreman 3.16.0.12-1.el9sat, foreman-cli 3.16.0.12-1.el9sat, foreman-ec2 3.16.0.12-1.el9sat, foreman-pcp 3.16.0.12-1.el9sat, foreman-redis 3.16.0.12-1.el9sat, foreman-vmware 3.16.0.12-1.el9sat, +7 more
    fixed: vendor fix RHSA-2026:5968
  • Red Hat Satellite 6.16 for RHEL 8 libcomps 0.1.23-0.1.el8pc, satellite 6.16.7-1.el8sat, python-brotli 1.2.0-0.1.el8pc, satellite-cli 6.16.7-1.el8sat, python-django 4.2.28-0.1.el8pc, python-pulp-rpm 3.26.7-1.el8pc, +13 more Red Hat Satellite 6.16 for RHEL 9 libcomps 0.1.23-0.1.el9pc, satellite 6.16.7-1.el9sat, python-brotli 1.2.0-0.1.el9pc, satellite-cli 6.16.7-1.el9sat, python-django 4.2.28-0.1.el9pc, python-pulp-rpm 3.26.7-1.el9pc, +13 more Red Hat Satellite 6.18 for RHEL 9 satellite 6.18.4-2.el9sat, satellite-cli 6.18.4-2.el9sat, python3.12-django 4.2.29-1.el9pc, rubygem-rubyipmi 0.13.0-1.el9sat, satellite-common 6.18.4-2.el9sat, rubygem-katello 4.18.0.9-1.el9sat, +10 more
    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

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
7 mo ago

Exploit prediction

1.92% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2437036 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CISA ADP 3.1 8.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Satellite 6.16 for RHEL 8
  • Red Hat Red Hat Satellite 6.16 for RHEL 9
  • Red Hat Red Hat Satellite 6.17 for RHEL 9
  • Red Hat Red Hat Satellite 6.18 for RHEL 9
  • Red Hat Red Hat Satellite 6

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

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.