CVE-2026-25856 json
OpenBullet2 0.3.2 Authenticated RCE via Job Configuration Interface
published 2026-06-08 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-35135
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 1
- Metasploit
Summary
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.
Timeline
- First public exploit (Metasploit exploit/multi/http/openbullet2_unauth_rce_cve_2026_25856)
- Published
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit exploit/multi/http/openbullet2_unauth_rce_cve_2026_25856 OpenBullet2 Unauthenticated RCE via Config Configuration Interface metasploit exploit, excellent rank, 2026-06-08
- hackernoon.com https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | 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/E:X/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 |
Affected products
- openbullet openbullet2
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
hackernoon.com
/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2
technical-description, exploit
-
vulncheck.com
/advisories/openbullet2-authenticated-rce-via-job-configuration-interface
third-party-advisory
Sources
- CVE List CVE-2026-25856
- NVD CVE-2026-25856
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.