Vulnerability Description
Mercator is an open source web application designed to enable mapping of information systems. A stored Cross-Site Scripting (XSS) vulnerability exists in Mercator prior to version 2026.02.22 due to the use of unescaped Blade directives (`{!! !!}`) in display templates. An authenticated user with the User role can inject arbitrary JavaScript payloads into fields such as "contact point" when creating or editing entities. The payload is then executed in the browser of any user who views the affected page, including administrators. Version 2026.02.22 fixes the vulnerability.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sourcentis | Mercator | < 2026.02.22 |
Related Weaknesses (CWE)
References
- https://github.com/dbarzin/mercator/commit/839d231399944e43a865198262e96e0218252Patch
- https://github.com/dbarzin/mercator/commit/9902ffd91f287e474729f514c77261f4ef7dbPatch
- https://github.com/dbarzin/mercator/commit/c58bb1d2fff18605c61d93cfaf77adca416c5Patch
- https://github.com/dbarzin/mercator/security/advisories/GHSA-65p7-pph2-966gVendor AdvisoryMitigation
FAQ
What is CVE-2026-27639?
CVE-2026-27639 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Mercator is an open source web application designed to enable mapping of information systems. A stored Cross-Site Scripting (XSS) vulnerability exists in Mercator prior to version 2026.02.22 due to th...
How severe is CVE-2026-27639?
CVE-2026-27639 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27639?
Check the references section above for vendor advisories and patch information. Affected products include: Sourcentis Mercator.