CVE-2026-34577
8.6 · HIGHOverview
CVE-2026-34577 is a high-severity vulnerability affecting gitroom postiz. It was published on April 2, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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 validation is url.endsWith('mp4'), which is trivially bypassable by appending .mp4 as a query parameter value or URL fragment. The endpoint requires no authentication and has no SSRF protections, allowing an unauthenticated attacker to read responses from internal services, cloud metadata endpoints, and other network-internal resources. This issue has been patched in version 2.21.3.
Remediation
Check the references section for vendor advisories and patches from gitroom. Update postiz to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| gitroom | postiz | >= 0, < 2.21.3 | Affected |
Frequently Asked Questions
What is CVE-2026-34577?
CVE-2026-34577 is a high-severity vulnerability affecting gitroom postiz. It was published on April 2, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).
How severe is CVE-2026-34577?
This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-34577?
Check the references section for vendor advisories and patches from gitroom. Update postiz to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-34577?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-34577 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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