CVE-2026-73259

mediumpriority · track · 0EPSS 0.004 · 35 %ileUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.41% (35th) EPSS
CVSS 5.4 · medium
Is it mine?
1 products
Check your exposure
Who says so?
1 sources
nvd

EPSS · scored 2026-10-27

Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can send a crafted percent-encoded request path to a deployment using MG_ENABLE_DIRLIST and persuade a user to visit it. The mg_http_serve_dir() and listdir() path in src/http.c places the decoded request URI into the title and h1 elements without HTML entity encoding. The resulting reflected cross-site scripting executes in the Mongoose origin and can expose session data or perform actions as the victim. This issue is fixed in version 7.22.

01

cvss

Technical severity, 0–10. One row per scoring source.

5.4
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Nsecondary · security-advisories@github.comexploitability 2.8 · impact 2.5
v3.15mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79US
04

affected products (1)

Products and version ranges known to be affected.

05

sources

Which sources assert this record, and when.

nvdNVDCVE.orgMITRE
published 2026-08-20modified 2026-10-18
06

references (4) nvd

External citations — patches, advisories, analysis.

scry

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