CVE-2026-42346 Postiz: TOCTOU DNS rebinding bypasses all SSRF URL validation paths

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...

CVE-2026-42298

CVE-2026-42298 affects Postiz (AI social media scheduling tool). The issue arises in the Build and Publish PR Docker Image workflow (.github/workflows/pr-docker-build.yml), where an unauthenticated user can cause arbitrary code execution during Docker image build by submitting a fork with a malic...

EUVD-2026-28849

Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow .github/workflows/pr-docker-build.yml allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a...

CVE-2026-42298 Postiz: Arbitrary Code Execution and Token Exfiltration in pr-docker-build.yml via untrusted Dockerfile.dev

Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow .github/workflows/pr-docker-build.yml allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a...

CVE-2026-42298 Postiz: Arbitrary Code Execution and Token Exfiltration in pr-docker-build.yml via untrusted Dockerfile.dev

Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow .github/workflows/pr-docker-build.yml allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a...

Gitroom Postiz 跨站脚本漏洞

Gitroom Postiz is an open-source social media scheduling tool developed by Gitroom. Versions of Gitroom Postiz from 2.21.6 to 2.21.7 contained a cross-site scripting vulnerability. This vulnerability allowed any authenticated user to store arbitrary HTML in post content by manipulating saved...

Gitroom Postiz 代码问题漏洞

Gitroom Postiz is an open-source social media scheduling tool developed by Gitroom. Versions of Gitroom Postiz from 2.16.6 to 2.21.7 contained code vulnerabilities. These vulnerabilities were caused by a TOCTOU vulnerability in the SSRF protection mechanism, which could allow attackers to redirec...

PT-2026-39214

Name of the Vulnerable Software and Affected Versions Postiz versions 2.16.6 through 2.21.6 Description Postiz is an AI social media scheduling tool. A Time-of-Check-Time-of-Use TOCTOU issue exists where the isSafePublicHttpsUrl function resolves DNS to validate the target IP, but subsequent fetc...

Gitroom Postiz 代码注入漏洞

Gitroom Postiz is an open-source social media scheduling tool developed by Gitroom. Previous versions of Gitroom Postiz had a code injection vulnerability. This vulnerability stemmed from a Pwn Request vulnerability present in the workflow for building and publishing PR Docker images, which could...

CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

CVE-2026-40487 Postiz Has Unrestricted File Upload via MIME Type Spoofing that Leads to Stored XSS

Postiz is an AI social media scheduling tool. Prior to version 2.21.6, a file upload validation bypass allows any authenticated user to upload arbitrary HTML, SVG, or other executable file types to the server by spoofing the Content-Type header. The uploaded files are then served by nginx with a...

CVE-2026-40487

Postiz is an AI social media scheduling tool. Before version 2.21.6, a file upload validation bypass lets any authenticated user upload HTML/SVG or other executable types by spoofing Content-Type, after which nginx serves them with a Content-Type derived from the original extension (text/html, im...

Gitroom Postiz 安全漏洞

Gitroom Postiz is an open-source social media scheduling tool developed by Gitroom. Versions of Gitroom Postiz prior to 2.21.6 contained security vulnerabilities. These vulnerabilities were caused by a bypass in file upload validation, which could lead to storage-side cross-site scripting attacks...

CVE-2026-40168

Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a...

CVE-2026-40168

Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a...

CVE-2026-40168

Postiz is affected by a Server-Side Request Forgery (SSRF) in the /api/public/stream endpoint prior to version 2.21.5. The vulnerability arises because the app validates the initially supplied URL and blocks direct private/internal hosts, but does not re-validate the final destination after HTTP ...

CVE-2026-40168 Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream

Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a...

CVE-2026-40168 Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream

Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a...

CVE-2026-40168 Postiz has Server-Side Request Forgery via Redirect Bypass in /api/public/stream

Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a...