CVE-2026-76821

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Source
https://cve.org/CVERecord?id=CVE-2026-76821
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76821.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-76821
Aliases
  • GHSA-7g3x-wc2m-9h9x
Published
2026-09-15T19:38:19Z
Modified
2026-09-17T03:47:25Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
OpenCTI: User-Controlled ReDoS in JSON Ingestion Mapper
Details

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260706.0, the JSON ingestion mapper's extractWithRegexp formula function compiled a user-supplied regular expression with the JavaScript RegExp engine in opencti-platform/opencti-graphql/src/parser/json-mapper.ts without validating its complexity. An authenticated user with JSON mapper creation permission could provide a catastrophically backtracking pattern and matching ingestion input, blocking the Node.js event loop and making the GraphQL API unavailable to all users. Scheduled ingestion could repeatedly execute the malicious mapper without additional attacker action, and recovery could require disabling the mapper and restarting the process. The issue affects availability and does not expose or modify data. This issue is fixed in version 7.260706.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1333",
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76821.json"
}
References

Affected packages

Git / github.com/opencti-platform/opencti

Affected ranges

Type
GIT
Repo
https://github.com/opencti-platform/opencti
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3d726c09480f96980ce4c3e6119a8034dbdf2c96
Fixed
392acb86419f9d89202143f58f6faa55872ded18
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "7.260706.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*
1.0.0
1.0.1
1.0.2
1.1.0
1.1.2
2.*
2.0.1
2.0.2
2.1.0
2.1.1
2.1.2
2.1.3
2.1.4
3.*
3.0.0
3.0.1
3.0.2
3.0.3
3.2.0
3.2.2
3.3.0
3.3.1
3.3.2
4.*
4.0.0
4.0.1
4.0.2
4.0.3
4.0.4
4.0.5
4.0.6
4.0.7
4.1.0
4.1.1
4.1.2
4.2.0
4.2.1
4.2.2
4.2.3
4.2.4
4.3.0
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.4.0
4.4.1
4.5.0
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
5.*
5.0.0
5.0.1
5.0.2
5.0.3
5.1.0
5.1.1
5.1.2
5.1.3
5.1.4
5.10.0
5.10.1
5.10.2
5.10.3
5.11.0
5.11.1
5.11.10
5.11.11
5.11.12
5.11.13
5.11.2
5.11.3
5.11.4
5.11.5
5.11.6
5.11.7
5.11.8
5.11.9
5.12.0
5.12.1
5.12.10
5.12.11
5.12.12
5.12.13
5.12.14
5.12.15
5.12.16
5.12.17
5.12.18
5.12.19
5.12.2
5.12.20
5.12.21
5.12.22
5.12.23
5.12.24
5.12.25
5.12.26
5.12.27
5.12.3
5.12.4
5.12.5
5.12.6
5.12.7
5.12.8
5.12.9
5.2.0
5.2.1
5.2.2
5.2.3
5.2.4
5.3.0
5.3.1
5.3.10
5.3.11
5.3.12
5.3.13
5.3.14
5.3.15
5.3.16
5.3.17
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.3.9
5.4.0
5.4.1
5.5.0
5.5.1
5.5.2
5.5.3
5.5.4
5.6.0
5.6.1
5.6.2
5.7.0
5.7.1
5.7.2
5.7.3
5.7.4
5.7.5
5.7.6
5.8.0
5.8.1
5.8.2
5.8.3
5.8.4
5.8.5
5.8.6
5.8.7
5.9.0
5.9.1
5.9.2
5.9.3
5.9.4
5.9.5
5.9.6
6.*
6.0.0
6.0.10
6.0.2
6.0.3
6.0.4
6.0.5
6.0.6
6.0.7
6.0.8
6.0.9
6.1.0
6.1.1
6.1.10
6.1.12
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.1.7
6.1.8
6.1.9
6.2.0
6.2.1
6.2.10
6.2.11
6.2.12
6.2.13
6.2.14
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
6.2.9
6.3.0
6.3.1
6.3.3
6.3.4
6.3.5
6.3.6
6.4.0
6.4.1
6.4.10
6.4.11
6.4.2
6.4.3
6.4.4
6.4.5
6.4.6
6.4.7
6.4.8
6.4.9
6.5.1
6.5.10
6.5.11
6.5.2
6.5.3
6.5.4
6.5.5
6.5.6
6.5.7
6.5.8
6.5.9
6.6.0
6.6.1
6.7.0
6.7.1
6.7.10
6.7.11
6.7.12
6.7.13
6.7.14
6.7.15
6.7.16
6.7.17
6.7.18
6.7.19
6.7.2
6.7.20
6.7.3
6.7.4
6.7.5
6.7.6
6.7.7
6.7.8
6.7.9
6.8.0
6.8.1
6.8.10
6.8.11
6.8.12
6.8.13
6.8.14
6.8.15
6.8.16
6.8.17
6.8.2
6.8.3
6.8.4
6.8.5
6.8.6
6.8.7
6.8.8
6.8.9
6.9.0
7.*
7.260224.0
7.260227.0
7.260305.0
7.260306.0
7.260306.1
7.260309.0
7.260317.0
7.260318.0
7.260326.0
7.260401.0
7.260409.0
7.260416.0
7.260417.0
7.260422.0
7.260423.0
7.260428.0
7.260430.0
7.260506.0
7.260507.0
7.260510.0
7.260512.0
7.260513.0
7.260515.0
7.260520.0
7.260521.0
7.260522.0
7.260527.0
7.260529.0
7.260604.0
7.260609.0
7.260615.0
7.260619.0
7.260624.0
7.260626.0
7.260701.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76821.json"