CVE-2026-40196 | sysadminsmedia homebox up to 0.24.x Web Interface incorrect ownership assignment (GHSA-6pvm-v73p-p6m9)

VDB-358115 · CVE-2026-40196 · GHSA-6PVM-V73P-P6M9 SYSADMINSMEDIA HOMEBOX UP TO 0.24.X WEB INTERFACE INCORRECT OWNERSHIP ASSIGNMENT HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.0 $0-$5k 2.47 Summaryinfo A vulnerability identified as critical has been detected in sysadminsmedia homebox up to 0.24.x. Affected is an unknown function of the component Web Interface. The manipulation leads to incorrect ownership assignment. This vulnerability is referenced as CVE-2026-40196. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component. Detailsinfo A vulnerability was found in sysadminsmedia homebox up to 0.24.x and classified as critical. This issue affects some unknown functionality of the component Web Interface. The manipulation with an unknown input leads to a incorrect ownership assignment vulnerability. Using CWE to declare the problem leads to CWE-708. The product assigns an owner to a resource, but the owner is outside of the intended control sphere. Impacted is confidentiality, integrity, and availability. The summary by CVE is: HomeBox is a home inventory and organization system. Versions prior to 0.25.0 contain a vulnerability where the defaultGroup ID remained permanently assigned to a user after being invited to a group, even after their access to that group was revoked. While the web interface correctly enforced the access revocation and prevented the user from viewing or modifying the group's contents, the API did not. Because the original group ID persisted as the user's defaultGroup, and this value was not properly validated when the X-Tenant header was omitted, the user could still perform full CRUD operations on the group's collections through the API, bypassing the intended access controls. This issue has been fixed in version 0.25.0. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-40196 since 04/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. Upgrading to version 0.25.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Vendor sysadminsmedia Name homebox Version 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.20 0.21 0.22 0.23 0.24 Website Product: https://github.com/sysadminsmedia/homebox/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.2 VulDB Meta Temp Score: 7.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.1 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: Incorrect ownership assignment CWE: CWE-708 / 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: homebox 0.25.0 Timelineinfo 04/09/2026 CVE reserved 04/17/2026 +8 days Advisory disclosed 04/17/2026 +0 days VulDB entry created 04/17/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-6pvm-v73p-p6m9 Status: Confirmed CVE: CVE-2026-40196 (🔒) GCVE (CVE): GCVE-0-2026-40196 GCVE (VulDB): GCVE-100-358115 Entryinfo Created: 04/17/2026 23:47 Changes: 04/17/2026 23:47 (65) Complete: 🔍 Cache ID: 99:E94:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸