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Vulnerability record · CVE-2026-40168 · published 10 April 2026

CVE-2026-40168: Gitroom postiz server-side request forgery (ssrf) vulnerability

Gitroom · Postiz

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.

8.2 CVSS 3.1 High EPSS 0.52% · top 58.5% CWE-918 · Server-side request forgery (SSRF)
8.2CVSS 3.1 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06 Patch
https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5 ProductRelease Notes
https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww ExploitMitigationVendor Advisory
https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-40168), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.