VULNERABILITY INTELLIGENCE

CVE-2026-52846

CVSS score4.2 MEDIUM
EPSS probability0.25%
CISA KEVNot currently listed
Published2026-06-23
Last modified2026-06-29
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-116

Primary references