Vulnerability record · CVE-2026-53804 · published 20 August 2026

CVE-2026-53804: OS command injection vulnerability

OTRS Community Edition contains an authenticated OS command injection vulnerability in the PGP encryption module that allows administrators to execute arbitrary operating-system commands by supplying crafted values for the PGP binary path and command options. Administrator-supplied configuration values are concatenated without sanitization into a shell command, enabling arbitrary command execution as the web server process user during normal ticket operations after the malicious configuration is deployed.

8.6 CVSS 4.0 High EPSS 1.5% · top 26.2% CWE-78 · OS command injection Deferred

8.6CVSS 4.0 base score

1.5%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

2References

24 Sep 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/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:

References

Link	Tags
https://h00die-gr3y.github.io/research/cve-2026-53804/
https://www.vulncheck.com/advisories/otrs-community-edition-os-command-injection-via-pgp-configuration

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Source: NIST National Vulnerability Database (record CVE-2026-53804), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.