High 8.5Published Feb 24, 2026

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

Updated under an hour ago (Oct 27, 2026, 10:10 PM ET)

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Every CVE for dbarzin mercator

Exploited in the last 30 days

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: 8.5 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

dbarzin mercator dbarzin:mercator (from the name)	before 2026.02.22	CNA record
sourcentis mercator sourcentis:mercator	before 2026.02.22	NVD

References

References

https://github.com/dbarzin/mercator/security/advisories/GHSA-65p7-pph2-966g	x-refsource-confirm, mitigation, vendor-advisory
https://github.com/dbarzin/mercator/commit/839d231399944e43a865198262e96e0218252cc3	x-refsource-misc, patch
https://github.com/dbarzin/mercator/commit/9902ffd91f287e474729f514c77261f4ef7db8fe	x-refsource-misc, patch
https://github.com/dbarzin/mercator/commit/c58bb1d2fff18605c61d93cfaf77adca416c560a	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.