What is CVE-2026-34590?

CVE-2026-34590 is a medium-severity vulnerability in Gitroomhq Postiz-app, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.4/10. Published 2026-04-02.

How severe is CVE-2026-34590?

Medium severity. CVSS v3 base score is 5.4 out of 10.

SSRF in Gitroomhq Postiz-app

CVE-2026-34590

Postiz is an AI social media scheduling tool. Prior to version 2.21.4, the POST /webhooks/ endpoint for creating webhooks uses WebhooksDto which validates the url field with only @IsUrl() (format check), missing the @IsSafeWebhookUrl valid…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (12.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Gitroomhq Postiz-app — versions < 2.21.4

Weakness classification (CWE)

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

References

https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-wc9c-7cv8-m225 (x_refsource_CONFIRM)
https://github.com/gitroomhq/postiz-app/commit/5ae4c950db6aa516a31454b7a45b9480bca40a11 (x_refsource_MISC)
https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.4 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34590?: CVE-2026-34590 is a medium-severity vulnerability in Gitroomhq Postiz-app, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.4/10. Published 2026-04-02.
How severe is CVE-2026-34590?: Medium severity. CVSS v3 base score is 5.4 out of 10.