NVD / CVE Program· CNA GitHub_M

CVE-2026-27960: OpenCTI privilege escalation and unauthenticated access via default admin account

CriticalCVSS 9.8 · v3.1—Weaponized Fix available

Noroxi assessment

Priority: This week (action score 60/100)

A ready-made attack module is public (Metasploit, Nuclei); exploiting it takes no special expertise.
A ready-made attack tool exists and the flaw can be exploited over the network without an account, so priority is at least “This week”.
Probability of exploitation in the next 30 days: 7% (FIRST EPSS); higher than 94.3% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: OpenCTI-Platform opencti 6.9.13.

Don’t wait for the next maintenance window. Upgrade to OpenCTI-Platform opencti 6.9.13 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

PYSEC-2026-119

Published: May 5, 2026
Updated: Jul 25, 2026
EPSS: 7.0% · 94th percentile
CWE: CWE-287

Report tools

JSON

Action score

This week

Don’t wait for the next maintenance window.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 2 / 30 · 7.0%
Ready-made attack tool: 19 / 60 · floor: at least 60

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 9.8; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Weaponized exploit exists
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
citeum	opencti	cpe:2.3:a:citeum:opencti

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

citeum opencti6.9.0 and later · before 6.9.13

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

OpenCTI-Platform opencti
- >= 6.6.0, < 6.9.13affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
PyPI	pycti	from 6.9.0 · before 6.9.13	6.9.13

Same product

citeum: all records

Other highest-scoring records for the same primary product.

CVE-2026-39980OpenCTI affected by RCE via notifier template
40Plan
CVE-2025-61781GraphQL IDOR allows authenticated user to delete workspace content of other users
36Monitor
CVE-2025-24977OpenCTI has remote code execution and sensitive secrets exposed through web hook
36Monitor

Published before and after this one in the same product

← EarlierCVE-2026-21887Mar 12, 2026 · OpenCTI has a Semi-Blind SSRF via Unvalidated External URL in Data Ingestion Feature
30Monitor
← EarlierCVE-2026-21886Mar 17, 2026 · OpenCTI's GraphQL Mutations Allow Deletion of Unrelated Entities
32Monitor
Later →CVE-2026-44730May 26, 2026 · OpenCTI: Privilege escalation via graphQL API abusable by organization admins, due to incorrect ACL on userEdit relationAdd
28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
OpenCTI-Platform opencti	6.9.13 · description	Vendor (CNA)
PyPI:pycti	6.9.13	Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Metasploit module ×1
Nuclei detection template ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Metasploit module	exploit/linux/http/opencti_notifier_rceOpenCTI Authentication Bypass and Notifier EJS Remote Code Executionexploit	2026-05-04
Nuclei detection template	Nuclei template CVE-2026-27960	—

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

MetasploitMay 4, 2026-2 d
PublishedMay 5, 2026
TodayNov 12, 2026+191 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2024-45404510 days apartOpenCTI's lack of Rate Limit lead to OTP brute forcing
32Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-3998026 days apartOpenCTI affected by RCE via notifier template
40Plan
CVE-2026-2188754 days apartOpenCTI has a Semi-Blind SSRF via Unvalidated External URL in Data Ingestion Feature
30Monitor
CVE-2020-3704195 days apartOpenCTI 3.3.1 - Directory Traversal
28Monitor
CVE-2026-3521164 days apartOpenCTI: Elasticsearch Painless Script Injection via GraphQL `script` filter operator allows authenticated user to exfiltrate data and cause DoS
26Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1app.use("/admin", requireSession, adminRouter);
2

3// Route added later skips the middleware
4app.post("/admin-api/config", updateConfig);

Fixed

1const admin = express.Router();
2admin.use(requireSession, requireRole("admin"));
3

4admin.post("/config", updateConfig);
5app.use("/admin", admin);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log

Exploit maturitypoc → weaponizedOct 15, 2026, 3:31 AM UTC
Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

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

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

What does it mean in your environment?

We use this product, ask for help

Data sources and verification

CNA: GitHub_M

CVE.org (CNA)May 6, 2026, 3:17 PM UTC
CISA ADPMay 6, 2026, 3:17 PM UTC
NVDJul 25, 2026, 7:10 AM UTC
FIRST EPSSNov 11, 2026, 12:00 AM UTC
OSV / GHSANov 12, 2026, 3:18 AM UTC
MetasploitNov 12, 2026, 3:18 AM UTC
NucleiNov 12, 2026, 3:18 AM UTC

Each line is when that source was last processed for this record.