CVE-2026-4958 | OpenBMB XAgent 1.0.0 WebSocket Endpoint replayer.py ReplayServer.on_connect/ReplayServer.send_data interaction_id authorization

VDB-353835 · CVE-2026-4958 · GCVE-100-353835 OPENBMB XAGENT 1.0.0 WEBSOCKET ENDPOINT REPLAYER.PY REPLAYSERVER.ON_CONNECT/REPLAYSERVER.SEND_DATA INTERACTION_ID AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 2.8 $0-$5k 1.62 Summaryinfo A vulnerability classified as problematic has been found in OpenBMB XAgent 1.0.0. This impacts the function ReplayServer.on_connect/ReplayServer.send_data of the file XAgentServer/application/websockets/replayer.py of the component WebSocket Endpoint. Performing a manipulation of the argument interaction_id results in authorization. This vulnerability is known as CVE-2026-4958. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way. Detailsinfo A vulnerability classified as problematic has been found in OpenBMB XAgent 1.0.0. This affects the function ReplayServer.on_connect/ReplayServer.send_data of the file XAgentServer/application/websockets/replayer.py of the component WebSocket Endpoint. The manipulation of the argument interaction_id with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. It is possible to read the advisory at gist.github.com. This vulnerability is uniquely identified as CVE-2026-4958. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Technical details and a public exploit are known. The exploit is shared for download 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: 3.1 VulDB Meta Temp Score: 2.8 VulDB Base Score: 3.1 VulDB Temp Score: 2.8 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: Authorization CWE: CWE-639 / CWE-285 / CWE-266 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-2026-4958 (🔒) GCVE (CVE): GCVE-0-2026-4958 GCVE (VulDB): GCVE-100-353835 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/27/2026 09:13 Changes: 03/27/2026 09:13 (57) Complete: 🔍 Submitter: Eric-z Cache ID: 99:4FD:101 Submitinfo Accepted Submit #777618: OpenBMB XAgent v1.0.0 Authorization Bypass Through User-Controlled Key (CWE-639) (by Eric-z) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸