What is CVE-2026-34577?

CVE-2026-34577 is a high-severity vulnerability in Gitroomhq Postiz-app, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-04-02.

How severe is CVE-2026-34577?

High severity. CVSS v3 base score is 8.6 out of 10.

SSRF in Gitroomhq Postiz-app

CVE-2026-34577

Postiz is an AI social media scheduling tool. Prior to version 2.21.3, the GET /public/stream endpoint in PublicController accepts a user-supplied url query parameter and proxies the full HTTP response back to the caller. The only validati…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.002 (36.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Affected products

Gitroomhq Postiz-app — versions < 2.21.3

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-mv6h-v3jg-g539 (x_refsource_CONFIRM)
https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.3 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34577?: CVE-2026-34577 is a high-severity vulnerability in Gitroomhq Postiz-app, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-04-02.
How severe is CVE-2026-34577?: High severity. CVSS v3 base score is 8.6 out of 10.