Caddy vulnerabilities: known CVEs & security history
Caddy · Web server · 6 tracked CVEs · 1 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Caddy release lines — 6 in total, with 1 actively exploited in the wild. A CVE here doesn't mean your version is affected — check Caddy's current status and the safe version to run.
Known Caddy CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2023-44487⚡ exploited | high | 7.5 | 100% | 2023 |
| CVE-2026-52845 | high | 8.1 | 0% | 2026 |
| CVE-2026-45135 | high | 8.1 | 0% | 2026 |
| CVE-2026-52844 | high | 7.5 | 0% | 2026 |
| CVE-2026-45692 | medium | 5.4 | 0% | 2026 |
| CVE-2026-52846 | medium | 4.2 | 0% | 2026 |
Is my Caddy 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 Caddy version → · Monitor Caddy for new CVEs →
Caddy vulnerabilities — frequently asked
How many known vulnerabilities does Caddy have?
IsItPatched tracks 6 CVEs for Caddy, 1 of which is actively exploited (CISA KEV). 0 are critical-severity and 4 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Caddy have any actively-exploited vulnerabilities?
Yes — 1 Caddy CVE is in CISA's Known Exploited Vulnerabilities catalog, meaning it is confirmed exploited in the wild. Patch it as a priority.
What is the most severe Caddy vulnerability?
Among tracked issues, CVE-2023-44487 (HIGH, CVSS 7.5), which is actively exploited, ranks highest — a Uncontrolled resource consumption weakness.
Is Caddy safe to use?
It depends on the version. The latest supported Caddy 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: Caddy security status · Caddy end-of-life · actively-exploited CVEs. Always verify against Caddy's advisories — see our disclaimer.