OTRS vulnerabilities: known CVEs & security history
OTRS · IT service management · 8 tracked CVEs · 0 actively exploited · updated August 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all OTRS release lines — 8 in total. A CVE here doesn't mean your version is affected — check OTRS's current status and the safe version to run.
Known OTRS CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-48188 | critical | 9.1 | 0% | 2026 |
| CVE-2026-48209 | high | 7.1 | 0% | 2026 |
| CVE-2026-48208 | medium | 6.5 | 0% | 2026 |
| CVE-2026-48189 | medium | 5.7 | 0% | 2026 |
| CVE-2026-48187 | medium | 5.7 | 0% | 2026 |
| CVE-2026-48210 | medium | 5.7 | 0% | 2026 |
| CVE-2026-48191 | low | 3.5 | 0% | 2026 |
| CVE-2026-48190 | low | 3.5 | 0% | 2026 |
Is my OTRS version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your OTRS version → · Monitor OTRS for new CVEs →
OTRS vulnerabilities — frequently asked
How many known vulnerabilities does OTRS have?
IsItPatched tracks 8 CVEs for OTRS. 1 is critical-severity and 1 high-severity. These span every release line — what matters is whether the version you run is affected.
Does OTRS have any actively-exploited vulnerabilities?
None of OTRS's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe OTRS vulnerability?
Among tracked issues, CVE-2026-48188 (CRITICAL, CVSS 9.1) ranks highest — a Improper input validation weakness.
Is OTRS safe to use?
It depends on the version. The latest supported OTRS release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: OTRS security status · OTRS end-of-life · actively-exploited CVEs. Always verify against OTRS's advisories — see our disclaimer.