SSRF in Gitroom Postiz
CVE-2026-40168
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L.
EPSS exploit prediction
EPSS: 0.004 (31.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Gitroom Postiz
- Gitroomhq Postiz-App — versions < 2.21.5
Weakness classification (CWE)
References
- github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww (Exploit, Mitigation, Vendor Advisory)
- github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06 (Patch)
- github.com/gitroomhq/postiz-app/releases/tag/v2.21.5 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-40168?
- CVE-2026-40168 is a high-severity vulnerability in Gitroom Postiz, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.2/10. Published 2026-04-10.
- How severe is CVE-2026-40168?
- High severity. CVSS v3 base score is 8.2 out of 10.