CVE-2026-27960

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 69% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 configuration.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
38.3%
KEV
Not listed

Published

May 5, 2026

Last Modified

May 12, 2026

Advisory Details (1)

Auto-updated May 9, 2026
Patch available. Sources: github.
github Patch Available

Priviledge escalation and unauthenticated access using default admin · Advisory · OpenCTI-Platform/opencti · GitHub

https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-6vvv-vmfr-xhrx

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
pycti6.9.0 ... 6.9.9 (13 versions)6.9.13—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 178 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-06-28 14:07 UTCEPSS rescore
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  24. 2026-06-15 04:21 UTCEG score recompute
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  26. 2026-06-14 23:18 UTCEPSS rescore
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  35. 2026-06-12 10:42 UTCEG score recompute
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  45. 2026-06-10 22:18 UTCEPSS rescore
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  60. 2026-06-08 14:17 UTCEPSS rescore
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  62. 2026-06-08 11:27 UTCEG score recompute
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  67. 2026-06-07 15:25 UTCEPSS rescore
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  70. 2026-06-07 15:08 UTCEG score recompute
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  73. 2026-06-07 02:57 UTCEG score recompute
  74. 2026-06-06 22:51 UTCEG score recompute
  75. 2026-06-06 18:46 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-27960?
CVE-2026-27960 is a critical vulnerability published on May 5, 2026. 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…
When was CVE-2026-27960 disclosed?
CVE-2026-27960 was first published in the National Vulnerability Database on May 5, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27960 actively exploited?
CVE-2026-27960 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-27960?
CVE-2026-27960 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-27960?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27960, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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