CVE-2026-1961: A flaw was found in Foreman

This month

HIGH 8.0WATCHLISTUPGRADEUPGRADE

CVE-2026-1961 is a high-severity flaw (CVSS 8.0) affecting satellite, foreman. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 functiona

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-03-26
Last modified	2026-10-20

Publisher (CNA): Red Hat, Inc. · Vendor: redhat · theforeman

Last updated 2026-10-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-26 13:16 UTCPublished CVE record published
2026-10-20 16:03 UTCUpdated Record last modified

redhat satellite UPGRADE

Affected: >= 6.16 and < 6.16.7 · >= 6.17 and < 6.17.7 · >= 6.18 and < 6.18.4 · 6.0

Fixed in: 6.16.7, 6.17.7, 6.18.4

Safe to downgrade to: a release before 6.0

1. Check installed version

apt-cache policy satellite || rpm -q satellite || satellite --version

2. UPGRADE to 6.16.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade satellite

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade satellite

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.0 (Debian / Ubuntu)

apt-cache madison satellite sudo apt install satellite=<VERSION_BEFORE_6.0> sudo apt-mark hold satellite

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list satellite sudo dnf downgrade satellite-<VERSION_BEFORE_6.0> sudo dnf versionlock add satellite

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

theforeman foreman UPGRADE

Affected: < 3.16.3 · >= 3.17.0 and < 3.17.2 · >= 3.18.0 and < 3.18.1

Fixed in: 3.16.3, 3.17.2, 3.18.1

Safe to downgrade to: a release before 3.17.0

1. Check installed version

apt-cache policy foreman || rpm -q foreman || foreman --version

2. UPGRADE to 3.16.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade foreman

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade foreman

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.17.0 (Debian / Ubuntu)

apt-cache madison foreman sudo apt install foreman=<VERSION_BEFORE_3.17.0> sudo apt-mark hold foreman

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list foreman sudo dnf downgrade foreman-<VERSION_BEFORE_3.17.0> sudo dnf versionlock add foreman

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora ELN · perl-Encode · FIXED · 3.25-528.eln159 · FEDORA-2026-79991d0238 · source

sudo dnf upgrade --advisory=FEDORA-2026-79991d0238

Fedora 46 · fonttools · FIXED · 4.68.0-1.fc46 · FEDORA-2026-65d6c01c75 · source

sudo dnf upgrade --advisory=FEDORA-2026-65d6c01c75

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: kalnux/CVE-2026-1961-foreman-poc (0 stars)

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-1961?

satellite: upgrade to 6.16.7, 6.17.7, 6.18.4; foreman: upgrade to 3.16.3, 3.17.2, 3.18.1. Exact commands for each OS are on this page.

Is CVE-2026-1961 being exploited?

CVE-2026-1961 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-1961 affect?

CVE-2026-1961 affects satellite, foreman. Severity is high (CVSS 8.0). 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

How urgent is CVE-2026-1961?

Priority 58/100. High severity; Public exploit reference; On your watchlist

Related CVEs

CVE-2026-12112 HIGH 7.8 DOWNGRADE MITIGATE A flaw was found in the foreman-mcp-server
CVE-2026-13316 MEDIUM 4.4 UPGRADE MITIGATE A flaw has been found in foreman when HTTP parameters are modified in http_proxies_controller and http_proxy f
CVE-2026-96658 HIGH 8.8 UPGRADE UPGRADE A flaw was found in Foreman
CVE-2026-96659 CRITICAL 9.1 UPGRADE UPGRADE A flaw was found in Foreman
CVE-2026-12542 MEDIUM 5.3 UPGRADE UPGRADE A flaw was found in Foreman

References

← Back to latest CVEs