Vulnerability · Published Jan 12, 2026 · Assigned by VulnCheck
CVE-2026-22200osTicket (1.18.x < 1.18.3, 1.17.x < 1.17.7) PDF Export Arbitrary File Read
High 8.7
In plain English
A high-severity injection in osTicket from Enhancesoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 73.6% (higher than 99.5% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code.
Official description
Enhancesoft osTicket versions 1.18.x prior to 1.18.3 and 1.17.x prior to 1.17.7 contain an arbitrary file read vulnerability in the ticket PDF export functionality. A remote attacker can submit a ticket containing crafted rich-text HTML that includes PHP filter expressions which are insufficiently sanitized before being processed by the mPDF PDF generator during export. When the attacker exports the ticket to PDF, the generated PDF can embed the contents of attacker-selected files from the server filesystem as bitmap images, allowing disclosure of sensitive local files in the context of the osTicket application user. This issue is exploitable in default configurations where guests may create tickets and access ticket status, or where self-registration is enabled.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Enhancesoft | osTicket | 1.18.0 – before 1.18.31.17.0 – before 1.17.7 |
Weakness: CWE-74 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/osTicket/osTicket/releases/tag/v1.18.3 release-notes
- https://github.com/osTicket/osTicket/releases/tag/v1.17.7 release-notes
- https://github.com/osTicket/osTicket/commit/c59b067 patch
- https://horizon3.ai/attack-research/attack-blogs/ticket-to-shell-exploiting-php-filters-and-cnext-in-osticket-cve-2026-22200/ technical-description, exploit
- https://www.vulncheck.com/advisories/osticket-pdf-export-arbitrary-file-read third-party-advisory