What’s Vulnerable › Vulnerabilities

CVE-2026-60108: Zeek < 8.0.9 Uncontrolled Memory Consumption DoS via FTP Analyzer

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-10-24
• Weakness: CWE-770

Description

Zeek before 8.0.9 contains an uncontrolled memory consumption vulnerability in the FTP analyzer that allows unauthenticated remote attackers to cause process termination by sending a crafted FTP control session negotiating AUTH GSSAPI followed by a large ADAT control line. Attackers can exploit the NVT_Analyzer component's lack of a maximum line length check, causing it to continuously double its internal buffer without bounds during base64 decoding of an attacker-controlled ADAT token, resulting in denial of service of the Zeek sensor.

Affected products

• zeek: before 8.0.9 — fixed in 8.0.9

How to fix

Upgrade to a fixed version: zeek 8.0.9. Check the vendor advisory for mitigations.

References

• https://github.com/zeek/zeek/commit/93ff6950a90cfa9d00c1062cde429313a0402a01
• https://github.com/zeek/zeek/releases/tag/v8.0.9
• https://www.vulncheck.com/advisories/zeek-uncontrolled-memory-consumption-dos-via-ftp-analyzer

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