CVE-2026-34577 | gitroomhq postiz-app up to 2.21.2 Endpoint /public/stream server-side request forgery

VDB-354963 · CVE-2026-34577 · GCVE-0-2026-34577 GITROOMHQ POSTIZ-APP UP TO 2.21.2 ENDPOINT /PUBLIC/STREAM SERVER-SIDE REQUEST FORGERY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.8 $0-$5k 0.93+ Summaryinfo A vulnerability was found in gitroomhq postiz-app up to 2.21.2. It has been rated as critical. This issue affects some unknown processing of the file /public/stream of the component Endpoint. Performing a manipulation results in server-side request forgery. This vulnerability was named CVE-2026-34577. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised. Detailsinfo A vulnerability, which was classified as critical, was found in gitroomhq postiz-app up to 2.21.2. This affects an unknown function of the file /public/stream of the component Endpoint. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: 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. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-34577 since 03/30/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. Upgrading to version 2.21.3 eliminates this vulnerability. Productinfo Vendor gitroomhq Name postiz-app Version 2.21.0 2.21.1 2.21.2 Website Product: https://github.com/gitroomhq/postiz-app/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.9 VulDB Meta Temp Score: 7.8 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.6 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 2.21.3 Timelineinfo 03/30/2026 CVE reserved 04/02/2026 +3 days Advisory disclosed 04/02/2026 +0 days VulDB entry created 04/02/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-34577 (🔒) GCVE (CVE): GCVE-0-2026-34577 GCVE (VulDB): GCVE-100-354963 Entryinfo Created: 04/02/2026 19:38 Changes: 04/02/2026 19:38 (65) Complete: 🔍 Cache ID: 99:1AC:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸