# github.com/caddyserver/caddy (Go) vulnerabilities

6 known vulnerabilities (2 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: v1.0.5 (Jan 15, 2020): affected by 4 advisories
- Newest unaffected release: Every release is affected by at least one advisory
- Releases: 46 since v0.5.0 (Apr 28, 2015)
- Registry: https://pkg.go.dev/github.com/caddyserver/caddy
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-52845: v0.5.0 to v1.0.5 (through the newest release)
- CVE-2026-52844: v0.5.0 to v1.0.5 (through the newest release)
- CVE-2026-52846: v0.5.0 to v1.0.5 (through the newest release)
- CVE-2022-29718: v0.5.0 to v1.0.5 (through the newest release)
- CVE-2018-21246: v0.5.0 to v0.10.12 (v0.10.13 is outside it)
- CVE-2018-19148: v0.5.0 to v0.11.0 (v0.11.1 is outside it)

## Advisories (6)

### [CVE-2026-52845](https://cve.now/CVE-2026-52845): Caddy: FastCGI header normalization bypass in \`forward\_auth copy\_headers\`

- Severity: High 8.1
- Published: Jun 23, 2026
- Affected: through 1.0.5.
- No fix released. The latest release, v1.0.5, is still affected.

### [CVE-2026-52844](https://cve.now/CVE-2026-52844): Caddy: Windows \`file\_server\` path authorization bypass via encoded backslash

- Severity: High 7.5
- Published: Jun 23, 2026
- Affected: through 1.0.5.
- No fix released. The latest release, v1.0.5, is still affected.

### [CVE-2026-52846](https://cve.now/CVE-2026-52846): Caddy: stripHTML template function bypass

- Severity: Medium 4.2
- Published: Jun 23, 2026
- Affected: through 1.0.5.
- No fix released. The latest release, v1.0.5, is still affected.

### [CVE-2022-29718](https://cve.now/CVE-2022-29718): Caddy v2.4 was discovered to contain an open redirect vulnerability.

- Severity: Unrated
- Published: Jun 2, 2022
- Affected: fixed in 2.5.0.
- No fix released. The advisory names 2.5.0 as the fix, which the registry doesn't have yet. The latest release, v1.0.5, is still affected.

### [CVE-2018-21246](https://cve.now/CVE-2018-21246): Caddy before 0.10.13 mishandles TLS client authentication, as demonstrated by an authentication bypass caused by the lack of the…

- Severity: Unrated
- Published: Jun 15, 2020
- Affected: fixed in 0.10.13.
- Fixed in v0.10.13 (released Apr 18, 2018, 789 days before disclosure).
- The latest release, v1.0.5, is not affected.

### [CVE-2018-19148](https://cve.now/CVE-2018-19148): Caddy through 0.11.0 sends incorrect certificates for certain invalid requests, making it easier for attackers to enumerate hostnames.

- Severity: Unrated
- Published: Nov 10, 2018
- Affected: fixed in 0.11.1.
- Fixed in v0.11.1 (released Nov 12, 2018, 2 days after disclosure).
- The latest release, v1.0.5, is not affected.

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