{"cve":"CVE-2026-21887","nvd":{"published":"2026-03-12T17:16:36.813","modified":"2026-06-17T10:19:05.640","status":"Analyzed","description":"OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 6.8.16, the OpenCTI platform’s data ingestion feature accepts user-supplied URLs without validation and uses the Axios HTTP client with its default configuration (allowAbsoluteUrls: true). This allows attackers to craft requests to arbitrary endpoints, including internal services, because Axios will accept and process absolute URLs. This results in a semi-blind SSRF, as responses may not be fully visible but can still impact internal systems. This vulnerability is fixed in 6.8.16.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":7.7},"cwes":["CWE-918"],"references":["https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-ffm6-vvph-g5f5"],"products":["citeum:opencti"],"source":"nvd","synced_at":"2026-10-19T22:25:53.701907451+00:00"},"epss":{"cve":"CVE-2026-21887","score":0.00226,"percentile":0.1329,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-ffm6-vvph-g5f5","url":"https://osv.dev/vulnerability/GHSA-ffm6-vvph-g5f5","summary":"OpenCTI has Semi-Blind SSRF via Unvalidated External URL in Data Ingestion Feature","modified":"2026-06-22T17:15:08.045739291Z","packages":[{"ecosystem":"PyPI","name":"pycti","purl":"pkg:pypi/pycti","ranges":["<6.8.16"],"fixed":["6.8.16"]}]},{"id":"PYSEC-2026-118","url":"https://osv.dev/vulnerability/PYSEC-2026-118","summary":"","modified":"2026-05-20T09:19:14.733128Z","packages":[{"ecosystem":"PyPI","name":"pycti","purl":"pkg:pypi/pycti","ranges":["<6.8.16"],"fixed":["6.8.16"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}