# Citeum Opencti vulnerabilities

Source: https://junglewise.ai/threats/technologies/opencti  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/opencti.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 11 vulnerabilities in Citeum Opencti: 0 in the last 7 days and 2 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-76821, was published on 15 September 2026. Nothing in the last four weeks, down from 2 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 11 (1 critical, 0 exploited in the wild)

## About Citeum Opencti

Open-source platform for threat intelligence and cyber threat analysis.

## Latest Citeum Opencti vulnerabilities

- [CVE-2026-76821: OpenCTI JSON mapper ReDoS via unvalidated regular expression](https://junglewise.ai/threats/cve-2026-76821-opencti-json-mapper-redos-via-unvalidated-regular-expression) (info, published 15 Sep 2026)
- [CVE-2026-76820: OpenCTI unauthorized internal network access via fetchRemoteStreams](https://junglewise.ai/threats/cve-2026-76820-opencti-unauthorized-internal-network-access-via) (high, CVSS 7.7, published 15 Sep 2026)
- [CVE-2026-35211: Filigran OpenCTI Code Injection in GraphQL API](https://junglewise.ai/threats/cve-2026-35211-filigran-opencti-code-injection-in-graphql-api) (medium, CVSS 6.5, published 8 Jul 2026)
- [CVE-2026-35210: Filigran OpenCTI authorization bypass via synchronized-upsert header](https://junglewise.ai/threats/cve-2026-35210-filigran-opencti-authorization-bypass-via-synchronized-upsert) (high, CVSS 7.1, published 8 Jul 2026)
- [CVE-2026-21887: OpenCTI SSRF in Data Ingestion Feature](https://junglewise.ai/threats/cve-2026-21887-opencti-ssrf-in-data-ingestion-feature) (high, CVSS 7.7, published 22 Jun 2026)
- [CVE-2024-37155: OpenCTI GraphQL introspection restriction bypass](https://junglewise.ai/threats/cve-2024-37155-opencti-graphql-introspection-restriction-bypass) (medium, CVSS 6.5, published 22 Jun 2026)
- [CVE-2026-35212: OpenCTI XSS in email-message observable body rendering](https://junglewise.ai/threats/cve-2026-35212-opencti-xss-in-email-message-observable-body-rendering) (low, CVSS 3.1, published 2 Jun 2026)
- [CVE-2026-44730: OpenCTI privilege escalation in userEdit relationAdd](https://junglewise.ai/threats/cve-2026-44730-opencti-privilege-escalation-in-useredit-relationadd) (high, CVSS 7.2, published 26 May 2026)
- [CVE-2026-27960: OpenCTI privilege escalation and authentication bypass in API](https://junglewise.ai/threats/cve-2026-27960-opencti-privilege-escalation-and-authentication-bypass-in-api) (critical, CVSS 9.8, published 5 May 2026)
- [CVE-2025-61782: OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version…](https://junglewise.ai/threats/cve-2025-61782-pysec-2026-2264-opencti-is-an-open-source-platform-for-managing) (medium, CVSS 5.4, published 7 Jan 2026)
- [CVE-2025-61781: OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version…](https://junglewise.ai/threats/cve-2025-61781-pysec-2026-116-opencti-is-an-open-source-platform-for-managing) (high, CVSS 7.1, published 5 Jan 2026)

## Most severe Citeum Opencti vulnerabilities

- [CVE-2026-27960: OpenCTI privilege escalation and authentication bypass in API](https://junglewise.ai/threats/cve-2026-27960-opencti-privilege-escalation-and-authentication-bypass-in-api) (critical, CVSS 9.8, published 5 May 2026)
- [CVE-2026-76820: OpenCTI unauthorized internal network access via fetchRemoteStreams](https://junglewise.ai/threats/cve-2026-76820-opencti-unauthorized-internal-network-access-via) (high, CVSS 7.7, published 15 Sep 2026)
- [CVE-2026-21887: OpenCTI SSRF in Data Ingestion Feature](https://junglewise.ai/threats/cve-2026-21887-opencti-ssrf-in-data-ingestion-feature) (high, CVSS 7.7, published 22 Jun 2026)
- [CVE-2026-44730: OpenCTI privilege escalation in userEdit relationAdd](https://junglewise.ai/threats/cve-2026-44730-opencti-privilege-escalation-in-useredit-relationadd) (high, CVSS 7.2, published 26 May 2026)
- [CVE-2026-35210: Filigran OpenCTI authorization bypass via synchronized-upsert header](https://junglewise.ai/threats/cve-2026-35210-filigran-opencti-authorization-bypass-via-synchronized-upsert) (high, CVSS 7.1, published 8 Jul 2026)
- [CVE-2025-61781: OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version…](https://junglewise.ai/threats/cve-2025-61781-pysec-2026-116-opencti-is-an-open-source-platform-for-managing) (high, CVSS 7.1, published 5 Jan 2026)
- [CVE-2026-35211: Filigran OpenCTI Code Injection in GraphQL API](https://junglewise.ai/threats/cve-2026-35211-filigran-opencti-code-injection-in-graphql-api) (medium, CVSS 6.5, published 8 Jul 2026)
- [CVE-2024-37155: OpenCTI GraphQL introspection restriction bypass](https://junglewise.ai/threats/cve-2024-37155-opencti-graphql-introspection-restriction-bypass) (medium, CVSS 6.5, published 22 Jun 2026)
- [CVE-2025-61782: OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version…](https://junglewise.ai/threats/cve-2025-61782-pysec-2026-2264-opencti-is-an-open-source-platform-for-managing) (medium, CVSS 5.4, published 7 Jan 2026)
- [CVE-2026-35212: OpenCTI XSS in email-message observable body rendering](https://junglewise.ai/threats/cve-2026-35212-opencti-xss-in-email-message-observable-body-rendering) (low, CVSS 3.1, published 2 Jun 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 2 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 2 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Citeum Opencti vulnerabilities", https://junglewise.ai/threats/technologies/opencti, 11 November 2026.