# CVE-2026-8194: osTicket CSRF bypass in Dispatcher via method override

Source: https://junglewise.ai/threats/cve-2026-8194-osticket-csrf-bypass-in-dispatcher-via-method-override  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-09. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-8194 · Severity: medium · CVSS 4.3 · Published 2026-05-09

osTicket is an open-source customer support ticket system. A security flaw allows an attacker to trick a staff member's browser into performing unauthorized actions, such as deleting notes or tickets, simply by having the staff member view a malicious ticket or image. This could lead to unauthorized data modification or loss of administrative records.

## Quick answers

**Is CVE-2026-8194 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-8194 being exploited in the wild.

**How severe is CVE-2026-8194?** Medium severity, with a CVSS score of 4.3, published 9 May 2026.

**Which products and versions are affected?** osTicket osTicket up to 1.18.3.

**Is there a fix for CVE-2026-8194?** 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-2026-8194 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-8194?** Check whether anything you run is named in the advisory. 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

A Cross-Site Request Forgery (CSRF) vulnerability exists in osTicket up to version 1.18.3 due to a bypass in the Dispatcher component. The file 'include/class.dispatcher.php' incorrectly allows HTTP method overrides via the '_method' parameter in GET requests. Because the application's CSRF protection only validates POST requests, an attacker can use GET-based vectors (such as <img> tags) to trigger state-changing actions (e.g., DELETE or POST) that would normally require a CSRF token. An attacker can exploit this by embedding a malicious URL in a ticket that, when viewed by an authenticated agent, executes administrative actions in the agent's context. A pull request has been submitted to restrict method overrides to POST data, but a formal patch has not yet been merged.

## Affected products

- osTicket osTicket up to 1.18.3

## Timeline

- 2026-04-11: disclosed: Pull request with fix submitted to the project repository
- 2026-05-09: advisory: Vulnerability published via VulDB/NVD

## References

- [https://github.com/az10b/security-advisories/blob/main/csrf_bypass_osTicket.md](https://github.com/az10b/security-advisories/blob/main/csrf_bypass_osTicket.md)
- [https://github.com/osTicket/osTicket/](https://github.com/osTicket/osTicket/)
- [https://github.com/osTicket/osTicket/pull/6945](https://github.com/osTicket/osTicket/pull/6945)
- [https://vuldb.com/submit/802755](https://vuldb.com/submit/802755)
- [https://vuldb.com/vuln/362346](https://vuldb.com/vuln/362346)
- [https://vuldb.com/vuln/362346/cti](https://vuldb.com/vuln/362346/cti)