What is CVE-2026-34577?

CVE-2026-34577 is a high-severity vulnerability in Gitroom Postiz, 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 Gitroom Postiz

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: 0.005 (38.0th 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

Gitroom Postiz
Gitroomhq Postiz-app — versions < 2.21.3

Weakness classification (CWE)

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

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-34577?: CVE-2026-34577 is a high-severity vulnerability in Gitroom Postiz, 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.