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.

CVSS 3.1

8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-26)

CWE

CWE-918

Published

2026-04-10

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• gitroom:postiz

References

• https://github.com/gitroomhq/postiz-app/commit/30e8b777098157362769226d1b46d83ad616cb06
• https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.5
• https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww
• https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-34w8-5j2v-h6ww

Check your stackJSON