CVE-2026-25856: high-severity vulnerability in openbullet2
OpenBullet2 0.3.2 Authenticated RCE via Job Configuration Interface
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
56Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 8.7epss 1.1%
from disclosure to weaponsame day
Published on NVDJun 8
metasploitJun 8
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
openbullet · openbullet2public PoCs found — 1
cve_referencehackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — openbullet2
In the same product, most dangerous first.
CVE-2026-25555CRITICALOpenBullet2 0.3.2 Authentication Bypass via X-Api-Key HeaderEPSS 2.3%CVE-2026-39908HIGHOpenBullet2 0.3.2 NTLMv2 Hash Disclosure via UNC Path Proxy SourceEPSS 0.8%CVE-2026-25855HIGHOpenBullet2 0.3.2 Authenticated RCE via FileProxySource Script UploadEPSS 0.6%CVE-2026-25559HIGHOpenBullet2 0.3.2 Path Traversal via Wordlist EndpointEPSS 0.6%