CVE-2026-34577 is a high-severity Server-Side Request Forgery (SSRF) vulnerability affecting the Postiz AI social media scheduling tool, specifically versions prior to 2.21.3. This flaw in the GET /public/stream endpoint allows an unauthenticated attacker to bypass a weak URL validation and proxy responses from internal services, cloud metadata, and other network-internal resources. Rated with a CVSS score of 8.6 (High), the vulnerability has low attack complexity, requires no user interaction or authentication, and can lead to significant confidentiality compromise. While there is no known active exploitation, public exploit code, or inclusion in CISA's KEV catalog, the vulnerability has garnered some community discussion on social media platforms.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.21.3CPE matchmatch criteria | cpe:2.3:a:gitroom:postiz:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.