Vulnerability Description
Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitroom | Postiz | < 2.21.5 |
Related Weaknesses (CWE)
References
- https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83adPatch
- https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5ProductRelease Notes
- https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6wwExploitMitigationVendor Advisory
- https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6wwExploitMitigationVendor Advisory
FAQ
What is CVE-2026-40168?
CVE-2026-40168 is a vulnerability with a CVSS score of 8.2 (HIGH). Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct pr...
How severe is CVE-2026-40168?
CVE-2026-40168 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40168?
Check the references section above for vendor advisories and patch information. Affected products include: Gitroom Postiz.