CVE-2026-73255 Details
Description
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.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71 | [email protected] | Patch |
| https://github.com/cesanta/mongoose/pull/3611 | [email protected] | Issue TrackingPatch |
| https://github.com/cesanta/mongoose/releases/tag/7.22 | [email protected] | Release Notes |
| https://github.com/cesanta/mongoose/security/advisories/GHSA-h7m9-764r-7x4x | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| cesanta mongoose | < 7.22 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 18, 2026 | CVE Translated | [email protected] |
| Sep 29, 2026 | Initial Analysis | [email protected] |
| Aug 25, 2026 | CVE Modified | CISA-ADP |
| Aug 20, 2026 | New CVE Received | [email protected] |