The mg_handle_cgi function in mongoose.c in Mongoose 6.11 allows remote attackers to cause a denial of service (heap-based buffer over-read…

published 2018-06-19 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-2997

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

The mg_handle_cgi function in mongoose.c in Mongoose 6.11 allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash, or NULL pointer dereference) via an HTTP request, related to the mbuf_insert function.

Patch / fix

distros 1

smplayer Debian 14, Debian 13, Debian 12 18.5.0~ds1-1

debian advisories DEBIAN-CVE-2018-10945

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-10945 updated 2025-11-21 cvss 3.3

mongoose: Heap buffer over-read in mg_handle_cgi function in mongoose.c allows an application crash

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

blog.hac425.top http://blog.hac425.top/2018/05/16/CVE-2018-10945-mongoose.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-125 Out-of-bounds Read
CWE-476 NULL Pointer Dereference

References

blog.hac425.top /2018/05/16/CVE-2018-10945-mongoose.html
exploit, technical-description, third-party-advisory

Sources

CVE List CVE-2018-10945
NVD CVE-2018-10945

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary