CVEvulnerability

CVE-2026-42346

6.5 MEDIUM Published 2026-05-08 Modified 2026-07-24 Official page ↗
Status
Deferred
Published
2026-05-08
Last modified
2026-07-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Weaknesses
CWE-918

Description

Postiz is an AI social media scheduling tool. From version 2.16.6 to before version 2.21.7, all SSRF protections added in v2.21.4–v2.21.6 share a fundamental TOCTOU (Time-of-Check-Time-of-Use) vulnerability: isSafePublicHttpsUrl() resolves DNS to validate the target IP, but subsequent fetch() calls resolve DNS independently. An attacker controlling a DNS server can exploit this gap via DNS rebinding to redirect requests to internal network addresses. This issue has been patched in version 2.21.7.

Related

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References