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Description

OpenBullet2 through version 0.3.2 contains an authenticated remote code execution vulnerability that allows authenticated users to execute arbitrary C# code on the server host by creating or modifying job configurations. Attackers can leverage the plain C# execution mode, which lacks reference filtering or API restrictions, to access the file system, spawn processes, and invoke arbitrary .NET APIs as the process user.

PUBLISHED Reserved 2026-02-06 | Published 2026-06-08 | Updated 2026-06-08 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Improper Control of Generation of Code ('Code Injection')

Product status

Default status
affected

Any version
affected

Credits

Maksim Rogov finder

VulnCheck finder

References

hackernoon.com/...dmin-how-an-auth-bypass-breaks-openbullet2 technical-description exploit

www.vulncheck.com/...ted-rce-via-job-configuration-interface third-party-advisory

cve.org (CVE-2026-25856)

nvd.nist.gov (CVE-2026-25856)

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