This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-52846 →

DEBIAN-CVE-2026-52846

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...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 caddy

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 caddy

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.2-12+deb13u1"}]}]

Debian:14 caddy

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.4-1"}]}]

References

advisory security-tracker.debian.org