OpenCTI May Bypass Introspection RestrictionGHSA-4mvw-j8r9-xcgc
MEDIUMFix: OpenCTI-Platform/opencti@f87d969GHSA-4mvw-j8r9-xcgc is a medium-severity (CVSS 6.5) CWE-284 vulnerability in pycti. A fix is available for pycti — see the affected versions and patch details below.
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for GHSA-4mvw-j8r9-xcgc.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
pyctiReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
OpenCTI is an open source platform allowing organizations to manage their cyber threat intelligence knowledge and observables. Prior to version 6.1.9, the regex validation used to prevent Introspection queries can be bypassed by removing the extra whitespace, carriage return, and line feed characters from the query. GraphQL Queries in OpenCTI can be validated using the secureIntrospectionPlugin. The regex check in the plkugin can be bypassed by removing the carriage return and line feed characters (\r\n). Running a curl command against a local instance of OpenCTI will result in a limited error message. By running the same Introspection query without the \r\n characters, the unauthenticated user is able to successfully run a full Introspection query. Bypassing this restriction allows the attacker to gather a wealth of information about the GraphQL endpoint functionality that can be used to perform actions and/or read data without authorization. These queries can also be weaponized to conduct a Denial of Service (DoS) attack if sent repeatedly. Users should upgrade to version 6.1.9 to receive a patch for the issue.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | pycti | all versions | 6.1.9pip install --upgrade 'pycti==6.1.9' |
Affected Products
opencticiteumDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pycti, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update pycti to 6.1.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4mvw-j8r9-xcgc is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.
Frequently Asked Questions
Is GHSA-4mvw-j8r9-xcgc in your dependencies?
Find it across PyPI, including transitive dependencies.