CVE-2026-27960

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.8% (78th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.8%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation1.8% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.8%
EPSS %ILE
78th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 5, 2026

Last Modified

July 25, 2026

Advisory Details (1)

Auto-updated Oct 10, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

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 rangeFix by version rangeDependents
pycti6.9.0 ... 6.9.9 (13 versions)
  • 6.9.0 up to 6.9.13: fixed in 6.9.13
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 28× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 92 of 202 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 8 repeat rows among the latest 100 are merged into the row they repeat. The 110 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 09:51 UTCEG score recompute
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.8% · 78th percentile
  3. 2026-10-13 07:46 UTCEG score recompute
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  5. 2026-10-12 16:17 UTCEG score recompute
  6. 2026-10-11 19:59 UTCEG score recompute
  7. 2026-10-11 17:12 UTCEG score recompute
  8. 2026-10-11 14:43 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  12. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  13. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  15. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  16. 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  18. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  20. 2026-09-30 10:11 UTCOSV refresh
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  23. 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.8% · 77th percentile
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 2.0% · 79th percentile
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 2.0% · 79th percentile
Show 67 more
  1. 2026-09-17 19:30 UTCEPSS rescoreEPSS 2.0% · 79th percentile
  2. 2026-09-16 14:08 UTCEPSS rescoreEPSS 2.0% · 79th percentile
  3. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  4. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  5. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  6. 2026-09-11 16:53 UTCOSV refresh
  7. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  8. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  9. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  10. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  11. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  12. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  13. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  14. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  15. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  16. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  17. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  18. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  19. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  20. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  21. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  22. 2026-08-23 20:43 UTCEG score recompute
  23. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  26. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  27. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  28. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  29. 2026-08-17 13:02 UTCEG score recompute
  30. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  31. 2026-08-16 04:58 UTCEG score recompute
  32. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  33. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  34. 2026-08-14 03:34 UTCEG score recompute
  35. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  36. 2026-08-12 17:11 UTCEG score recompute
  37. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  38. 2026-08-11 16:02 UTCEG score recompute
  39. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  40. 2026-08-11 01:36 UTCEG score recompute
  41. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  42. 2026-08-09 15:05 UTCEG score recompute
  43. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  44. 2026-08-09 02:40 UTCEG score recompute
  45. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  46. 2026-08-07 19:26 UTCEG score recompute
  47. 2026-08-06 16:58 UTCEG score recompute
  48. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  49. 2026-08-05 22:25 UTCEG score recompute
  50. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  51. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  52. 2026-08-03 19:56 UTCEG score recompute
  53. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  54. 2026-08-02 05:15 UTCEG score recompute
  55. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  56. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  57. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  58. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  59. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  60. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  61. 2026-07-26 08:31 UTCEG score recompute
  62. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  63. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  64. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  65. 2026-07-23 03:08 UTCEG score recompute
  66. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  67. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.5% · 38th percentile

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2026/CVE-2026-27960.yaml
    Published Sep 15, 2026

    OpenCTI < 6.9.13 - Authentication Bypass via User Impersonation

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-27960?
CVE-2026-27960 is a critical-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-27960 published?
The CVE record for CVE-2026-27960 was published on May 5, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 25, 2026; the record at its source may have been updated since.
Is CVE-2026-27960 actively exploited?
CVE-2026-27960 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.8% probability of exploitation in the next 30 days (78th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2026-27960 is available: update to the fixed version the vendor names in its advisory.

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