CVE-2026-32638 | withstudiocms up to 0.4.3 REST API Rank authorization (GHSA-xvf4-ch4q-2m24)

VDB-351637 · CVE-2026-32638 · GHSA-XVF4-CH4Q-2M24 WITHSTUDIOCMS UP TO 0.4.3 REST API RANK AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 2.7 $0-$5k 1.30+ Summaryinfo A vulnerability classified as problematic has been found in withstudiocms studiocms up to 0.4.3. Affected by this vulnerability is an unknown functionality of the component REST API. This manipulation of the argument Rank causes authorization. This vulnerability is tracked as CVE-2026-32638. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component. Detailsinfo A vulnerability was found in withstudiocms studiocms up to 0.4.3. It has been declared as problematic. Affected by this vulnerability is some unknown processing of the component REST API. The manipulation of the argument rank with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect confidentiality. The summary by CVE is: StudioCMS is a server-side-rendered, Astro native, headless content management system. Prior to 0.4.4, the REST API `getUsers` endpoint in StudioCMS uses the attacker-controlled `rank` query parameter to decide whether owner accounts should be filtered from the result set. As a result, an admin token can request `rank=owner` and receive owner account records, including IDs, usernames, display names, and email addresses, even though the adjacent `getUser` endpoint correctly blocks admins from viewing owner users. This is an authorization inconsistency inside the same user-management surface. Version 0.4.4 fixes the issue. The advisory is shared at github.com. This vulnerability is known as CVE-2026-32638 since 03/12/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but no exploit is available. Upgrading to version 0.4.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch aebe8bcb3618bb07c6753e3f5c982c1fe6adea64 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. Productinfo Vendor withstudiocms Name studiocms Version 0.4.0 0.4.1 0.4.2 0.4.3 License open-source Website Product: https://github.com/withstudiocms/studiocms/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 2.7 VulDB Meta Temp Score: 2.7 VulDB Base Score: 2.7 VulDB Temp Score: 2.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 2.7 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: Authorization CWE: CWE-639 / CWE-285 / CWE-266 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: studiocms 0.4.4 Patch: aebe8bcb3618bb07c6753e3f5c982c1fe6adea64 Timelineinfo 03/12/2026 CVE reserved 03/18/2026 +6 days VulDB entry created 03/19/2026 +0 days Advisory disclosed 03/19/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-xvf4-ch4q-2m24 Status: Confirmed CVE: CVE-2026-32638 (🔒) GCVE (CVE): GCVE-0-2026-32638 GCVE (VulDB): GCVE-100-351637 Entryinfo Created: 03/19/2026 00:09 Changes: 03/19/2026 00:09 (68) Complete: 🔍 Cache ID: 99:C06:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸