CVE-2026-73255: Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can control an SSI-enabled file can place directory traversal sequences…

PriorityP345medium6.5CVSS 3.1

AVNACLPRLUINSUCHINAN

EPSS

0.59%

47.1th percentile

Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can control an SSI-enabled file can place directory traversal sequences in an #include file or #include virtual directive. The mg_ssi() function in src/ssi.c concatenates the directive argument into a filesystem path without calling mg_path_is_sane(), allowing an MG_ENABLE_SSI deployment with ssi_pattern configured to disclose files readable by the Mongoose process. This issue is fixed in version 7.22.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
cesanta	mongoose	< 7.22	7.22

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