CVE-2026-73254
Last modified
CVE-2026-73254 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can create a file with an HTML payload in its name can trigger stored cross-site scripting when a user browses a directory served with MG_ENABLE_DIRLIST. EPSS estimates a 0.19% chance of exploitation in the next 30 days.
Description
Mongoose is an embedded web server and network library. Prior to 7.22, an attacker who can create a file with an HTML payload in its name can trigger stored cross-site scripting when a user browses a directory served with MG_ENABLE_DIRLIST. The printdirentry() path called by listdir() in src/http.c URL-encodes the href but inserts the raw filesystem filename into the HTML link text. The browser executes the injected markup in the Mongoose origin, which can expose session data or permit actions as the victim. This issue is fixed in version 7.22.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| cesanta | mongoose | < 7.22 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-73254?
How severe is CVE-2026-73254?
How do I fix CVE-2026-73254?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-73248calibre is an e-book manager. Prior to 9.12.0, calibre proce…8.5
- CVE-2026-73249calibre is an e-book manager. Prior to 9.12.0, the calibre C…7.5
- CVE-2026-7325Improper authorization in the Active Directory browsing feat…7.1
- CVE-2026-73250Notepad++ is a free and open-source source code editor. Prio…5.4
- CVE-2026-73251Mongoose is an embedded web server and network library. Prio…9.3
- CVE-2026-73253Mongoose is an embedded web server and network library. Prio…9.1
- CVE-2026-73255Mongoose is an embedded web server and network library. Prio…6.5
- CVE-2026-73256Mongoose is an embedded web server and network library. Prio…9.1
- CVE-2026-73257Mongoose is an embedded web server and network library. Prir…9.1
- CVE-2026-73258Mongoose is an embedded web server and network library. Prio…6.5
- CVE-2026-73259Mongoose is an embedded web server and network library. Prio…5.4
- CVE-2026-7326A cross-site request forgery vulnerability in the Admin UI o…8.8
Are you affected by CVE-2026-73254?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST