CVE-2026-27639 HIGH

CVE-2026-27639: Mercator vulnerable to stored XSS via unescaped Blade directives in display templates

Vendor Dbarzin
Product mercator
Weakness CWE-79 · XSS
Published February 25, 2026
Last update February 25, 2026
View on NVD All CVEs

CVSS base score

8.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 25, 2026 CVE published
February 25, 2026 Record updated

Related vulnerabilities

04Related CVE

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