What is CVE-2026-25855?

CVE-2026-25855 is a high-severity vulnerability in Openbullet Openbullet2, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-06-08.

How severe is CVE-2026-25855?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Openbullet Openbullet2

CVE-2026-25855

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.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.006 (45.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Openbullet Openbullet2 — versions 0.2.5

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-25855?: CVE-2026-25855 is a high-severity vulnerability in Openbullet Openbullet2, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-06-08.
How severe is CVE-2026-25855?: High severity. CVSS v3 base score is 8.8 out of 10.