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Public proof of conceptFix available

CVE-2026-1961

A public proof of concept exists; no exploitation attested.

  • Published2026-03-26
  • Fixed in6.18.4 · 6.17.7 · 6.16.7
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-03-2613:16CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-1961?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-1961?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Redhat satelliteversion to verify
BranchAffectedFixed in
6.18≥ 6.18, < 6.18.46.18.4
6.17≥ 6.17, < 6.17.76.17.7
6.16≥ 6.16, < 6.16.76.16.7
6.0= 6.0no fix published
Theforeman foreman
BranchAffectedFixed in
3.18≥ 3.18.0, < 3.18.13.18.1
3.17≥ 3.17.0, < 3.17.23.17.2
3.16< 3.16.33.16.3

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • RHSA-2026:5971 Red Hat Product Security32 products fixed

    Red Hat Security Advisory: Satellite 6.16.7 Async Update

  • RHSA-2026:5970 Red Hat Product Security50 products fixed

    Red Hat Security Advisory: Satellite 6.17.7 Async Update

  • RHSA-2026:5968 Red Hat Product Security15 products fixed

    Red Hat Security Advisory: Satellite 6.18.4 Async Update

Full record on NVD

Fix

  1. Update Redhat satellite to 6.18.4 · 6.17.7 · 6.16.7
  2. Vendor fix Red Hat Product Security RHSA-2026:5971 · 42 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2026:5970 · 87 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_satellite/6.17/html/updating_red_hat_satellite/index
  4. Vendor fix Red Hat Product Security RHSA-2026:5968 · 20 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.18/html/updating_red_hat_satellite/index
  5. Workaround from the vendor Red Hat Product Security RHSA-2026:5971 · 159 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Advisories and patches

Detection

read 2026-10-23 19:25 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedkalnux/CVE-2026-1961-foreman-poc
PoC-in-GitHub

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2026-03-26
Last Modified
2026-10-20
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-1961?

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.

Is CVE-2026-1961 actively exploited?

A proof-of-concept exploit exists for CVE-2026-1961, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-1961?

CVE-2026-1961 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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