What’s Vulnerable › Vulnerabilities

CVE-2026-6807: NSA GRASSMARLIN Improper Restriction of XML External Entity Reference

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-28 · updated 2026-10-26
• Weakness: CWE-611

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.

Affected products

• NSA GRASSMARLIN: all versions

References

• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-118-01.json
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-118-01

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