# CVE-2026-25856: OpenBullet2 authenticated remote code execution in job configurations

Source: https://junglewise.ai/threats/cve-2026-25856-openbullet2-authenticated-remote-code-execution-in-job  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-08. Updated: 2026-06-08  
License: CC BY 4.0 with a link back

CVE-2026-25856 · Severity: high · CVSS 8.8 · Published 2026-06-08

OpenBullet2, an automation suite used for web testing and data scraping, contains a flaw that allows users with login credentials to take full control of the server. By creating or modifying specific job configurations, an attacker can run malicious commands directly on the host system. This could lead to the theft of sensitive data, complete system takeover, or the use of the server for further attacks.

Technologies: [OpenBullet2](https://junglewise.ai/threats/technologies/openbullet2). Vendors: [OpenBullet2](https://junglewise.ai/threats/vendors/openbullet2).

## Quick answers

**Is CVE-2026-25856 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-25856 being exploited in the wild.

**How severe is CVE-2026-25856?** High severity, with a CVSS score of 8.8, published 8 June 2026.

**Which products and versions are affected?** OpenBullet2 through 0.3.2.

**Is there a fix for CVE-2026-25856?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-25856 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-25856?** Check whether you run OpenBullet2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An authenticated remote code execution (RCE) vulnerability exists in OpenBullet2 through version 0.3.2 due to improper control of generation of code (CWE-94). The application's job configuration interface allows users to utilize a 'plain C#' execution mode that lacks adequate reference filtering or API restrictions. An attacker with low-privileged authenticated access can create or modify a job to execute arbitrary C# code, enabling them to access the underlying file system, spawn new processes, and invoke .NET APIs with the privileges of the service user. The vulnerability is reachable over the network and does not require user interaction beyond the attacker's own actions.

## Affected products

- OpenBullet2 OpenBullet2 through 0.3.2

## Timeline

- 2026-06-06: disclosed: Initial researcher disclosure by Maksim Rogov
- 2026-06-08: advisory: NVD and VulnCheck published advisory details

## References

- [https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2](https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2)
- [https://www.vulncheck.com/advisories/openbullet2-authenticated-rce-via-job-configuration-interface](https://www.vulncheck.com/advisories/openbullet2-authenticated-rce-via-job-configuration-interface)

## Related threats

- [OpenBullet2 NTLMv2 hash disclosure via UNC path proxy source](https://junglewise.ai/threats/cve-2026-39908-openbullet2-ntlmv2-hash-disclosure-via-unc-path-proxy-source)
- [OpenBullet2 remote code execution in FileProxySource](https://junglewise.ai/threats/cve-2026-25855-openbullet2-remote-code-execution-in-fileproxysource)
- [OpenBullet2 path traversal in wordlist endpoint](https://junglewise.ai/threats/cve-2026-25559-openbullet2-path-traversal-in-wordlist-endpoint)
- [OpenBullet2 authentication bypass in API key middleware](https://junglewise.ai/threats/cve-2026-25555-openbullet2-authentication-bypass-in-api-key-middleware)