CVE-2026-6807

NSA GRASSMARLIN Improper Restriction of XML External Entity Reference

Published Apr 28, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Description
A vulnerability in GRASSMARLIN v3.2.1 allows crafted session data to
trigger improper handling of XML input, which may result in unintended
exposure of sensitive information. The flaw stems from insufficient
hardening of the XML parsing process.

Remediation

Vendor Workaround

NSA has indicated that the GRASSMARLIN project has reached end-of-life status as of 2017 and is no longer supported. The project is archived, and no patches or further updates are planned or expected.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Nsa
Nsa grassmarlin
Vendors & Products Nsa
Nsa grassmarlin
Type Values Removed Values Added
Description A vulnerability in GRASSMARLIN v3.2.1 allows crafted session data to trigger improper handling of XML input, which may result in unintended exposure of sensitive information. The flaw stems from insufficient hardening of the XML parsing process.
Title NSA GRASSMARLIN Improper Restriction of XML External Entity Reference
Weaknesses CWE-611
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Apr 29, 2026, 3:12 PM
Reserved
Apr 21, 2026, 4:01 PM
Status
Awaiting Analysis
Published
Apr 28, 2026, 7:37 PM
Modified
Oct 26, 2026, 8:10 PM