PT-2026-56809 · Zeek · Zeek

Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-60108

Mitre

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-60108

Affected Products

Zeek

References · 4

• https://github.com/zeek/zeek/commit/93ff6950a90cfa9d00c1062cde429313a0402a01 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-60108 · Security Note
• https://vulncheck.com/advisories/zeek-uncontrolled-memory-consumption-dos-via-ftp-analyzer · Note
• https://github.com/zeek/zeek/releases/tag/v8.0.9 · Note