CVE-2026-22200: 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

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-22200 is a high-severity flaw (CVSS 7.5) affecting osticket. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	73.6% (top 1%)
CISA exploited list	No
Weakness	CWE-74
Published	2026-01-12
Last modified	2026-07-14

Publisher (CNA): VulnCheck · Vendor: enhancesoft

Last updated 2026-07-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-12 19:16 UTCPublished CVE record published
2026-07-14 16:16 UTCUpdated Record last modified

enhancesoft osticket UPGRADE

Affected: >= 1.17 and < 1.17.7 · >= 1.18 and < 1.18.3

Fixed in: 1.17.7, 1.18.3

Safe to downgrade to: a release before 1.17

1. Check installed version

apt-cache policy osticket || rpm -q osticket || osticket --version

2. UPGRADE to 1.17.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade osticket

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade osticket

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.17 (Debian / Ubuntu)

apt-cache madison osticket sudo apt install osticket=<VERSION_BEFORE_1.17> sudo apt-mark hold osticket

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list osticket sudo dnf downgrade osticket-<VERSION_BEFORE_1.17> sudo dnf versionlock add osticket

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · jgmenu · FIXED · 4.7.0-1.fc46 · FEDORA-2026-3053ee4399 · source

sudo dnf upgrade --advisory=FEDORA-2026-3053ee4399

Fedora ELN · python-tkrzw · FIXED · 0.1.32-12.eln159 · FEDORA-2026-0161d71544 · source

sudo dnf upgrade --advisory=FEDORA-2026-0161d71544

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: horizon3ai/CVE-2026-22200 (14 stars)
Metasploit: osTicket Arbitrary File Read via PHP Filter Chains in mPDF
Nuclei scan template: osTicket - Arbitrary File Read

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-22200?

osticket: upgrade to 1.17.7, 1.18.3. Exact commands for each OS are on this page.

Is CVE-2026-22200 being exploited?

CVE-2026-22200 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-22200 affect?

CVE-2026-22200 affects osticket. Severity is high (CVSS 7.5). 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 tha

How urgent is CVE-2026-22200?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-26895 MEDIUM 5.3 UPGRADE User enumeration vulnerability in /pwreset.php in osTicket v1.18.2 allows remote attackers to enumerate valid
CVE-2025-45387 MEDIUM 5.4 UPGRADE osTicket prior to v1.17.6 and v1.18.2 are vulnerable to Broken Access Control Vulnerability in /scp/ajax.php.

References

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