CVE-2026-52846

MEDIUM EPSS 4.5%

Published Jun 23, 20261w ago · Modified Jun 23, 20261w ago

4.2 CVSS 3.1

Medium

Published Jun 23, 2026 1w ago

Last Modified Jun 23, 2026 1w ago

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.

CVSS Details

Base Score

4.2

Exploitability

1.6

Impact

2.5

Vector string

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction Required

Scope Unchanged

Confidentiality Low

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

4.5% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-116

References 1

github.com https://github.com/caddyserver/caddy/security/advisories/GHSA-vcc4-2c75-vc9v

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.