Vulnerability in GRASSMARLIN (CVE-2026-6807)
Summary
Vulnerability in GRASSMARLIN (CVE-2026-6807). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
View CSAF Summary Successful exploitation of this vulnerability could allow an attacker to disclose sensitive information. The following versions of NSA GRASSMARLIN are affected: GRASSMARLIN vers:all/* CVSS Vendor Equipment Vulnerabilities v3 5.5 NSA NSA GRASSMARLIN Improper Restriction of XML External Entity Reference Background Critical Infrastructure Sectors: Information Technology Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-6807 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. View CVE Details Affected Products NSA GRASSMARLIN Vendor:NSA Product Version:NSA GRASSMARLIN: vers:all/* Product Status:known_affected Remediations Vendor fixNSA 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. Relevant CWE: CWE-611 Improper Restriction of XML External Entity Reference Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Acknowledgments Grady DeRosa reported this vulnerability to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) a…
Source: CISA ICS Advisories NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-6807 has been found in GRASSMARLIN.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "GRASSMARLIN CVE-2026-6807" on the vendor's site.
CVE-2026-6807 (GRASSMARLIN)
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in GRASSMARLIN.
Check the vendor advisory for the affected versions of GRASSMARLIN.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'GRASSMARLIN' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'GRASSMARLIN' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
GRASSMARLINを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- ICSA cisa.gov