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Vulnerability record · CVE-2017-7185 · published 10 April 2017

CVE-2017-7185: Cesanta mongoose embedded web server library use after free vulnerability

Cesanta · Mongoose Embedded Web Server Library

Use-after-free vulnerability in the mg_http_multipart_wait_for_boundary function in mongoose.c in Cesanta Mongoose Embedded Web Server Library 6.7 and earlier and Mongoose OS 1.2 and earlier allows remote attackers to cause a denial of service (crash) via a multipart/form-data POST request without a MIME boundary string.

7.5 CVSS 3.0 High EPSS 12% · top 4.0% CWE-416 · Use after free
7.5CVSS 3.0 base score, v2 5.0
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Use-after-free vulnerability in the mg_http_multipart_wait_for_boundary function in mongoose.c in Cesanta Mongoose Embedded Web Server Library 6.7 and earlier and Mongoose OS 1.2 and earlier allows remote attackers to cause a denial of service (crash) via a multipart/form-data POST request without a MIME boundary string.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/archive/1/540355/100/0/threaded
http://www.securityfocus.com/bid/97370 Third Party AdvisoryVDB Entry
https://github.com/cesanta/mongoose-os/commit/042eb437973a202d00589b13d628181c6de5cf5b PatchThird Party Advisory
https://github.com/cesanta/mongoose/commit/b8402ed0733e3f244588b61ad5fedd093e3cf9cc PatchThird Party Advisory
https://www.compass-security.com/fileadmin/Datein/Research/Advisories/CVE-2017-7185_mongoose_os_use_after_free.txt ExploitTechnical DescriptionThird Party Advisory
https://www.exploit-db.com/exploits/41826/
http://www.securityfocus.com/archive/1/540355/100/0/threaded
http://www.securityfocus.com/bid/97370 Third Party AdvisoryVDB Entry
https://github.com/cesanta/mongoose-os/commit/042eb437973a202d00589b13d628181c6de5cf5b PatchThird Party Advisory
https://github.com/cesanta/mongoose/commit/b8402ed0733e3f244588b61ad5fedd093e3cf9cc PatchThird Party Advisory
https://www.compass-security.com/fileadmin/Datein/Research/Advisories/CVE-2017-7185_mongoose_os_use_after_free.txt ExploitTechnical DescriptionThird Party Advisory
https://www.exploit-db.com/exploits/41826/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-7185), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.