Vulnerability · Published Jun 8, 2026 · Assigned by VulnCheck

CVE-2026-25855OpenBullet2 0.3.2 Authenticated RCE via FileProxySource Script Upload

High 8.8

In plain English

A high-severity OS command injection in openbullet2 from openbullet. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.6%top 52.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

OpenBullet2 through version 0.3.2 contains a remote code execution vulnerability that allows authenticated users to execute arbitrary commands by uploading script files (.bat.ps1.sh) through the FileProxySource proxy loading feature. Attackers can upload malicious script files as proxy sources, causing the server to execute the scripts and return output as proxy lines, resulting in arbitrary command execution on the host as the process user.

Affected products (as reported)

Vendor	Product	Versions
openbullet	openbullet2	0.2.5 – through 0.3.2

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2 technical-description, exploit
https://www.vulncheck.com/advisories/openbullet2-authenticated-rce-via-fileproxysource-script-upload third-party-advisory