Resource exhaustion in Zeek
CVE-2026-60108
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Zeek — versions 0
Weakness classification (CWE)
References
- github.com/zeek/zeek/releases/tag/v8.0.9 (release-notes, Release Notes)
- github.com/zeek/zeek/commit/93ff6950a90cfa9d00c1062cde429313a0402a01 (Patch, patch)
- www.vulncheck.com/advisories/zeek-uncontrolled-memory-consumption-dos-via-ftp-a… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-60108?
- CVE-2026-60108 is a high-severity vulnerability in Zeek, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-09.
- How severe is CVE-2026-60108?
- High severity. CVSS v3 base score is 7.5 out of 10.