caddy: Caddy is an extensible server platform that uses TLS by default
CVE-2026-27589 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-27589, released February 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API (default listen `127.0.0.1:2019`) exposes a state-changing `POST /load` endpoint that replaces the entire running configuration. When origin enforcement is not enabled (`enforce_origin` not configured), the admin endpoint accepts cross-origin requests (e.g., from attacker-controlled web content in a victim browser) and applies an attacker-supplied JSON config. This can change the admin listener settings and alter HTTP server behavior without user intent. Version 2.11.1 contains a fix for the issue.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| caddy · Debian 12.15 (bookworm) | 2.6.2-5+deb12u1 | DEBIAN-CVE-2026-27589 | Feb 24, 2026 |
| caddy · Debian 13.5 (trixie) | 2.6.2-12+deb13u1 | DEBIAN-CVE-2026-27589 | Feb 24, 2026 |
| caddy · Debian 14 | 2.11.2-1 | DEBIAN-CVE-2026-27589 | Feb 24, 2026 |
| caddy · Fedora 43 | 2.10.2-9.fc43 | FEDORA-2026-3DC324BD9A | Jun 23, 2026 |
| caddy-debuginfo · Fedora 43 | 2.10.2-9.fc43 | FEDORA-2026-3DC324BD9A | Jun 23, 2026 |
| caddy-debugsource · Fedora 43 | 2.10.2-9.fc43 | FEDORA-2026-3DC324BD9A | Jun 23, 2026 |
| govulncheck-vulndb · opensuse-leap 15.6 | 0.0.20260226T182644-150000.1.149.1 | SUSE-SU-2026:0757-1 | Mar 3, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
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