CVE-2026-40168 | gitroomhq postiz-app up to 2.21.4 /api/public/stream server-side request forgery

VDB-356926 · CVE-2026-40168 · GCVE-0-2026-40168 GITROOMHQ POSTIZ-APP UP TO 2.21.4 /API/PUBLIC/STREAM SERVER-SIDE REQUEST FORGERY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.6 $0-$5k 0.56 Summaryinfo A vulnerability labeled as critical has been found in gitroomhq postiz-app up to 2.21.4. This impacts an unknown function of the file /api/public/stream. Executing a manipulation can lead to server-side request forgery. This vulnerability is handled as CVE-2026-40168. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded. Detailsinfo A vulnerability has been found in gitroomhq postiz-app up to 2.21.4 and classified as critical. This vulnerability affects an unknown part of the file /api/public/stream. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: 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 result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource. The advisory is available at github.com. This vulnerability was named CVE-2026-40168 since 04/09/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. Upgrading to version 2.21.5 eliminates this vulnerability. Productinfo Vendor gitroomhq Name postiz-app Version 2.21.0 2.21.1 2.21.2 2.21.3 2.21.4 Website Product: https://github.com/gitroomhq/postiz-app/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.7 VulDB Meta Temp Score: 7.6 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.2 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Server-side request forgery CWE: CWE-918 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: postiz-app 2.21.5 Timelineinfo 04/09/2026 CVE reserved 04/10/2026 +1 days Advisory disclosed 04/10/2026 +0 days VulDB entry created 04/10/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-40168 (🔒) GCVE (CVE): GCVE-0-2026-40168 GCVE (VulDB): GCVE-100-356926 Entryinfo Created: 04/10/2026 22:27 Changes: 04/10/2026 22:27 (64) Complete: 🔍 Cache ID: 99:39B:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸