CVE-2026-27960: OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables

Q: How do I fix CVE-2026-27960?

opencti: upgrade to 6.9.13. Exact commands for each OS are on this page.

Q: Is CVE-2026-27960 being exploited?

CVE-2026-27960 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-27960 affect?

CVE-2026-27960 affects opencti. Severity is critical (CVSS 9.8). OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. In versions 6.6.0 through 6.9.12, there is a privilege escalation vulnerability that can be exploited by unauthenticated attackers to query

Q: How urgent is CVE-2026-27960?

Priority 71/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-27960 is a critical-severity flaw (CVSS 9.8) affecting opencti. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. In versions 6.6.0 through 6.9.12, there is a privilege escalation vulnerability that can be exploited by unauthenticated attackers to query the API as any existing user, including the default admin account. This issue has been fixed in version 6.9.13. As a workaround, the default admin can be disabled using the `APP__ADMIN__EXTERNALLY_MANAGED` con

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	7.1% (top 6%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-05-05
Last modified	2026-07-25

Publisher (CNA): GitHub, Inc. · Vendor: citeum

Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-05 19:16 UTCPublished CVE record published
2026-07-25 11:10 UTCUpdated Record last modified

citeum opencti UPGRADE

Affected: >= 6.9.0 and < 6.9.13

Fixed in: 6.9.13

Safe to downgrade to: a release before 6.9.0

1. Check installed version

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

2. UPGRADE to 6.9.13 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade opencti

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 6.9.0 (Debian / Ubuntu)

apt-cache madison opencti sudo apt install opencti=<VERSION_BEFORE_6.9.0> sudo apt-mark hold opencti

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

dnf --showduplicates list opencti sudo dnf downgrade opencti-<VERSION_BEFORE_6.9.0> sudo dnf versionlock add opencti

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 46 · fzssh · FIXED · 1.4.0-2.fc46 · FEDORA-2026-8004fcd067 · source

sudo dnf upgrade --advisory=FEDORA-2026-8004fcd067

Public exploits and detection

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

Metasploit: OpenCTI Authentication Bypass and Notifier EJS Remote Code Execution
Nuclei scan template: OpenCTI < 6.9.13 - Authentication Bypass via User Impersonation

Advisories and coverage

Research and news

Rapid7 Blog: Metasploit Wrap Up: Langflow, MongoDB, and More 2026-10-23

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-2026-27960?

opencti: upgrade to 6.9.13. Exact commands for each OS are on this page.

Is CVE-2026-27960 being exploited?

CVE-2026-27960 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-2026-27960 affect?

CVE-2026-27960 affects opencti. Severity is critical (CVSS 9.8). OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. In versions 6.6.0 through 6.9.12, there is a privilege escalation vulnerability that can be exploited by unauthenticated attackers to query

How urgent is CVE-2026-27960?

Priority 71/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-35211 MEDIUM 6.5 UPGRADE OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables
CVE-2026-35210 HIGH 7.1 UPGRADE OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables
CVE-2026-44730 HIGH 7.2 UPGRADE OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables
CVE-2026-35212 MEDIUM 6.1 UPGRADE OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables
CVE-2026-39980 CRITICAL 9.1 UPGRADE OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables

References

← Back to latest CVEs