CVE-2026-22200
HighosTicket (1.18.x < 1.18.3, 1.17.x < 1.17.7) PDF Export Arbitrary File Read
Published Jan 12, 2026 · Updated Aug 12, 2026
Key Facts
Patch immediately- CVE-2026-22200 is a high-severity vulnerability (CVSS 8.7 v4) affecting osTicket (Enhancesoft).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 74% probability of exploitation in the next 30 days.
- Fixed versions are available, including osTicket 1.17.7, osTicket 1.18.3.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v4
8.7
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/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
EPSS (30-day exploit likelihood)
74%
Higher than 99.4% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2026-22200 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| osTicketEnhancesoft | >= 1.18.0 | 1.17.7 |
Patched Releases
osTicket
1.17.7, 1.18.3
Timeline
Publicly disclosed
Jan 12, 2026
Last updated
Aug 12, 2026
Weakness Type
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22200.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-22200
- advisoryhttps://www.vulncheck.com/advisories/osticket-pdf-export-arbitrary-file-read
- patchhttps://github.com/osTicket/osTicket/commit/c59b067
- exploithttps://horizon3.ai/attack-research/attack-blogs/ticket-to-shell-exploiting-php-filters-and-cnext-in-osticket-cve-2026-22200/
FAQ
Common Questions.
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.
Affected: osTicket (Enhancesoft) versions >= 1.18.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including osTicket 1.17.7, osTicket 1.18.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
Is CVE-2026-22200 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo