caddy: Caddy is an extensible server platform that uses TLS by default
CVE-2026-52846 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-52846, released June 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Caddy is an extensible server platform that uses TLS by default. Prior to 2.11.4, Caddy’s stripHTML template function cannot reliably remove all HTML tags from input strings. Certain malformed HTML, such as <<>img src=x onerror=alert()>, can bypass the tag-stripping logic, potentially leaving dangerous content in the output if it is later rendered as HTML. This may allow client-side XSS in cases where untrusted strings are rendered unsafely. This vulnerability is fixed in 2.11.4.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| caddy · Debian 12.15 (bookworm) | 2.6.2-5+deb12u1 | DEBIAN-CVE-2026-52846 | Jun 23, 2026 |
| caddy · Debian 13.5 (trixie) | 2.6.2-12+deb13u1 | DEBIAN-CVE-2026-52846 | Jun 23, 2026 |
| caddy · Debian 14 | 2.11.4-1 | DEBIAN-CVE-2026-52846 | Jun 23, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260727T201416-160000.1.1 | OPENSUSE-SU-2026:21551-1 | Aug 10, 2026 |
| govulncheck-vulndb · sles 16.0 | 0.0.20260727T201416-160000.1.1 | SUSE-SU-2026:23227-1 | Aug 10, 2026 |
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