Technology · Caddyserver
Caddyserver Caddy vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 8 vulnerabilities in Caddyserver Caddy: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-77281, was published on 17 September 2026.
- Last 7 days
- 0
- Last 90 days
- 1
- Critical, all time
- 0
- Exploited in the wild
- 0
About Caddyserver Caddy
Caddy is an open-source web server with automatic HTTPS written in Go.
Latest Caddyserver Caddy vulnerabilities
- CVE-2026-77281: Caddy placeholder re-expansion in URI rewritemediumCVSS 6.5EPSS 0.5%
- CVE-2026-52846: Caddyserver Caddy XSS bypass in stripHTML template functionmediumCVSS 4.2
- CVE-2026-52845: Caddy authentication bypass via FastCGI header normalization collisionhighCVSS 8.1
- CVE-2026-52844: Caddy path authorization bypass on Windows via encoded backslashhighCVSS 7.5
- CVE-2026-45692: Caddyserver Caddy authorization bypass in /config API via array index normalizationmediumCVSS 5.4
- CVE-2026-45135: Caddyserver Caddy Remote Code Execution in FastCGI splitPoshighCVSS 8.1
- Caddy auth bypass in PKI remote admin endpointsmediumCVSS 4.3
- Caddyserver Caddy expression language injection in vars_regexpmediumCVSS 5.5
Most severe Caddyserver Caddy vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-52845: Caddy authentication bypass via FastCGI header normalization collisionhighCVSS 8.1
- CVE-2026-45135: Caddyserver Caddy Remote Code Execution in FastCGI splitPoshighCVSS 8.1
- CVE-2026-52844: Caddy path authorization bypass on Windows via encoded backslashhighCVSS 7.5
- CVE-2026-77281: Caddy placeholder re-expansion in URI rewritemediumCVSS 6.5EPSS 0.5%
- Caddyserver Caddy expression language injection in vars_regexpmediumCVSS 5.5
- CVE-2026-45692: Caddyserver Caddy authorization bypass in /config API via array index normalizationmediumCVSS 5.4
- Caddy auth bypass in PKI remote admin endpointsmediumCVSS 4.3
- CVE-2026-52846: Caddyserver Caddy XSS bypass in stripHTML template functionmediumCVSS 4.2
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 1 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/caddy.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Caddyserver Caddy vulnerabilities", https://junglewise.ai/threats/technologies/caddy, 26 September 2026.