Plattform
python
Komponente
531ec6b169f4b9ecbc8c2f0b2cd7c5ee
Behoben in
1.0.1
CVE-2026-4959 is an authentication bypass vulnerability discovered in OpenBMB XAgent versions 1.0.0 through 1.0.0. This flaw allows attackers to bypass authentication checks by manipulating the interaction_id parameter within the ShareServer WebSocket Endpoint. Successful exploitation could lead to unauthorized access and potential data compromise. A public exploit is available, highlighting the urgency of remediation.
The primary impact of CVE-2026-4959 is the potential for unauthorized access to resources protected by the XAgent system. An attacker can exploit this vulnerability to bypass authentication and gain access to sensitive data or functionality without proper credentials. This could involve reading confidential information, modifying data, or even executing arbitrary code depending on the system's overall architecture and permissions. The public availability of an exploit significantly increases the risk, as it lowers the barrier to entry for malicious actors. Given the WebSocket nature of the endpoint, an attacker could potentially establish persistent connections and maintain unauthorized access.
CVE-2026-4959 is currently considered a high-risk vulnerability due to the availability of a public proof-of-concept exploit. The vulnerability was disclosed on 2026-03-27. The vendor, OpenBMB, was notified but did not respond. The EPSS score is likely to be medium to high, reflecting the ease of exploitation and potential impact. Active exploitation is probable given the public exploit.
Organizations deploying OpenBMB XAgent, particularly those relying on the ShareServer WebSocket Endpoint for critical functionality, are at risk. Systems with weak input validation or inadequate security monitoring are especially vulnerable. Shared hosting environments using OpenBMB XAgent should be prioritized for remediation.
• python / server: Monitor WebSocket traffic for requests with manipulated interaction_id parameters. Use tools like Wireshark or tcpdump to capture and analyze WebSocket messages.
tcpdump -i any -s 0 'port 80 or port 443' | grep -i 'interaction_id='• generic web: Check access logs for requests to the /XAgentServer/application/websockets/share.py endpoint with unusual or malformed interaction_id parameters.
grep 'interaction_id=' /var/log/apache2/access.logdisclosure
Exploit-Status
EPSS
0.07% (22% Perzentil)
CISA SSVC
CVSS-Vektor
The primary mitigation for CVE-2026-4959 is to upgrade to a patched version of OpenBMB XAgent as soon as it becomes available. Since no fixed version is provided, immediate action is critical. As a temporary workaround, consider implementing strict input validation on the interactionid parameter within the ShareServer WebSocket Endpoint. This could involve whitelisting allowed characters or enforcing length restrictions. Additionally, implement a Web Application Firewall (WAF) rule to block requests with suspicious interactionid values. Monitor WebSocket traffic for unusual patterns or unauthorized connections. After implementing mitigations, verify their effectiveness by attempting to reproduce the vulnerability with a test exploit.
Aktualisieren Sie auf eine gepatchte Version, die die angemessene Authentifizierung am ShareServer WebSocket Endpoint implementiert. Da der Anbieter nicht reagiert hat, wird empfohlen, den Quellcode zu überprüfen und manuell einen Patch anzuwenden, um die Identität des Benutzers zu validieren, bevor der Zugriff auf die Funktion check_user gewährt wird.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2026-4959 is a vulnerability in OpenBMB XAgent versions 1.0.0–1.0.0 that allows attackers to bypass authentication by manipulating the interaction_id parameter, potentially leading to unauthorized access.
If you are using OpenBMB XAgent version 1.0.0, you are potentially affected by this vulnerability. Immediate action is required.
Upgrade to a patched version of OpenBMB XAgent as soon as it becomes available. Until then, implement input validation and WAF rules as temporary mitigations.
Yes, a public exploit exists, indicating a high probability of active exploitation.
As of the disclosure date, OpenBMB has not released an official advisory. Monitor OpenBMB's website and security mailing lists for updates.
Lade deine Abhängigkeitsdatei hoch und erfahre sofort, ob dich diese und andere CVEs treffen.
Lade deine requirements.txt-Datei hoch und wir sagen dir sofort, ob du betroffen bist.