CVE-2026-122020 · Other
NO FIX YET
Nstbrowser up to 1.2.1 has a flaw in the stopAllBrowsers function behind the /api/agent/browser/stopAll endpoint of its Local Agent Management Service. A remote attacker can manipulate it to cause a denial of service, and a public exploit has been released.
first public Nov 4, 2026 · 1 source
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Teams running Nstbrowser up to version 1.2.1 with its Local Agent Management Service exposed to remote callers. The sources do not say which configurations expose the endpoint, and the vendor did not respond to disclosure.
Not affected if unknown
Who cares browser-automation, nstbrowser
1.2.1 or lowerNo fix yet, per the sources.
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.
This page as .md · .json · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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