# CVE-2026-21886: PYSEC-2026-117 - OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables…

Source: https://junglewise.ai/threats/cve-2026-21886-pysec-2026-117-opencti-is-an-open-source-platform-for-managing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-17  
License: CC BY 4.0 with a link back

CVE-2026-21886 · Severity: low · CVSS 3.1 · Published 2026-03-17

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.9.1, the GraphQL mutations "IndividualDeletionDeleteMutation" is intended to allow users to delete individual entity objects respectively. However, it was observed that this mutation can be misused to delete unrelated and sensitive objects such as analyses reports etc. This behavior stems from the lack of validation in the API to ensure that the targeted object is contextually related to the mutation being executed. Version 6.9.1 fixes the issue.

Technologies: [pycti (PyPI)](https://junglewise.ai/threats/technologies/pycti). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-21886 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21886 being exploited in the wild.

**How severe is CVE-2026-21886?** Low severity, with a CVSS score of 3.1, published 17 March 2026.

**Which products and versions are affected?** pycti (PyPI) ECOSYSTEM:introduced=0,fixed=6.9.1.

**Is there a fix for CVE-2026-21886?** Yes. pycti (PyPI): upgrade to 6.9.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-21886?** Check whether you run pycti (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- pycti (PyPI): upgrade to 6.9.1 or later

  ```sh
  pip install "pycti>=6.9.1"
  ```


## Affected products

- pycti (PyPI) ECOSYSTEM:introduced=0,fixed=6.9.1

## Identifiers

- CVE-2026-21886
- PYSEC-2026-117

## Related threats

- [Filigran OpenCTI Code Injection in GraphQL API](https://junglewise.ai/threats/cve-2026-35211-filigran-opencti-code-injection-in-graphql-api)
- [Filigran OpenCTI authorization bypass via synchronized-upsert header](https://junglewise.ai/threats/cve-2026-35210-filigran-opencti-authorization-bypass-via-synchronized-upsert)
- [OpenCTI SSRF in Data Ingestion Feature](https://junglewise.ai/threats/cve-2026-21887-opencti-ssrf-in-data-ingestion-feature)
- [OpenCTI GraphQL introspection restriction bypass](https://junglewise.ai/threats/cve-2024-37155-opencti-graphql-introspection-restriction-bypass)
- [OpenCTI XSS in email-message observable body rendering](https://junglewise.ai/threats/cve-2026-35212-opencti-xss-in-email-message-observable-body-rendering)