CVE-2026-4959 | OpenBMB XAgent 1.0.0 ShareServer WebSocket Endpoint share.py check_user interaction_id missing authentication

VDB-353836 · CVE-2026-4959 · GCVE-100-353836 OPENBMB XAGENT 1.0.0 SHARESERVER WEBSOCKET ENDPOINT SHARE.PY CHECK_USER INTERACTION_ID MISSING AUTHENTICATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.6 $0-$5k 1.74 Summaryinfo A vulnerability classified as critical was found in OpenBMB XAgent 1.0.0. Affected is the function check_user of the file XAgentServer/application/websockets/share.py of the component ShareServer WebSocket Endpoint. Executing a manipulation of the argument interaction_id can lead to missing authentication. This vulnerability is handled as CVE-2026-4959. The attack can be executed remotely. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way. Detailsinfo A vulnerability classified as critical was found in OpenBMB XAgent 1.0.0. This vulnerability affects the function check_user of the file XAgentServer/application/websockets/share.py of the component ShareServer WebSocket Endpoint. The manipulation of the argument interaction_id with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality, integrity, and availability. The advisory is shared for download at gist.github.com. This vulnerability was named CVE-2026-4959. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. It is possible to download the exploit at gist.github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor OpenBMB Name XAgent Version 1.0.0 CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.3 VulDB Meta Temp Score: 6.6 VulDB Base Score: 7.3 VulDB Temp Score: 6.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 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: Missing authentication CWE: CWE-306 / CWE-287 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 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: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/27/2026 Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Advisory: gist.github.com Status: Not defined CVE: CVE-2026-4959 (🔒) GCVE (CVE): GCVE-0-2026-4959 GCVE (VulDB): GCVE-100-353836 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/27/2026 09:13 Changes: 03/27/2026 09:13 (58) Complete: 🔍 Submitter: Eric-z Cache ID: 99:FF6:101 Submitinfo Accepted Submit #777622: OpenBMB XAgent v1.0.0 CWE-306 (by Eric-z) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸