Zammad vulnerabilities: known CVEs & security history
Zammad · IT service management · 10 tracked CVEs · 0 actively exploited · updated August 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Zammad release lines — 10 in total. A CVE here doesn't mean your version is affected — check Zammad's current status and the safe version to run.
Known Zammad CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-34723 | high | 7.5 | 0% | 2026 |
| CVE-2026-34724 | high | 7.2 | 0% | 2026 |
| CVE-2026-34721 | medium | 6.5 | 0% | 2026 |
| CVE-2026-34718 | medium | 6.1 | 0% | 2026 |
| CVE-2026-34248 | medium | 5.7 | 0% | 2026 |
| CVE-2026-34837 | medium | 4.3 | 0% | 2026 |
| CVE-2026-34782 | medium | 4.3 | 0% | 2026 |
| CVE-2026-34722 | medium | 4.3 | 0% | 2026 |
| CVE-2026-34720 | medium | 4.3 | 0% | 2026 |
| CVE-2026-34719 | medium | 4.3 | 0% | 2026 |
Is my Zammad 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 Zammad version → · Monitor Zammad for new CVEs →
Zammad vulnerabilities — frequently asked
How many known vulnerabilities does Zammad have?
IsItPatched tracks 10 CVEs for Zammad. 0 are critical-severity and 2 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Zammad have any actively-exploited vulnerabilities?
None of Zammad'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 Zammad vulnerability?
Among tracked issues, CVE-2026-34723 (HIGH, CVSS 7.5) ranks highest — a Improper access control weakness.
Is Zammad safe to use?
It depends on the version. The latest supported Zammad 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: Zammad security status · Zammad end-of-life · actively-exploited CVEs. Always verify against Zammad's advisories — see our disclaimer.