CVE-2026-53804

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.

CVSS v4.0

8.6 HIGHCVSS: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:X/V:X/RE:X/U:X

CVSS v3.1

7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

1.25% chance of exploitation in the next 30 days, 67th percentile

Published

2026-08-20

Updated

2026-08-21

Proof-of-concept exploits (1)

• https://h00die-gr3y.github.io/research/cve-2026-53804/

References

• CVE Record
• NVD entry

Related

• CVE-2026-53787
• CVE-2026-53805
• CVE-2026-5377
• CVE-2026-53875
• CVE-2026-53766
• CVE-2026-53913