Bug 2567783 (CVE-2026-122020)

Summary: CVE-2026-122020 nstbrowser: nstbrowser: Denial of Service via stopAll API endpoint
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Nstbrowser. A remote attacker could exploit this vulnerability by sending a crafted request to the stopAll API endpoint within the Local Agent Management Service. Successful exploitation allows the attacker to terminate active browser instances, resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-11-05 22:25:40 UTC 
A security flaw has been discovered in NST Labs Tech Nstbrowser up to 1.2.1. The affected element is the function stopAllBrowsers of the file /api/agent/browser/stopAll of the component Local Agent Management Service. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.