What is CVE-2026-27639?

CVE-2026-27639 is a medium-severity vulnerability in Dbarzin Mercator, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-02-25.

How severe is CVE-2026-27639?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Dbarzin Mercator

CVE-2026-27639

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 (`{…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (19.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Dbarzin Mercator — versions < 2026.02.22
Sourcentis Mercator

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27639?: CVE-2026-27639 is a medium-severity vulnerability in Dbarzin Mercator, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-02-25.
How severe is CVE-2026-27639?: Medium severity. CVSS v3 base score is 5.4 out of 10.