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TI-2026-42830 Aliases CVE-2026-60108GHSA-r3q8-ccf6-4xhj

Zeek < 8.0.9 Uncontrolled Memory Consumption DoS via FTP Analyzer

Priority MEDIUM 45CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00793 56th percentileScored 2026-11-07
Fix Fixed zeek (zeek): 8.0.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zeekzeekbefore 8.0.98.0.9Patch availableCNA
  • zeek Vendorzeek Affected before 8.0.9 Fixed in 8.0.9 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zeek:zeek:*:*:*:*:*:*:*:*before 8.0.9Vulnerablezeek
  • cpe:2.3:a:zeek:zeek:*:*:*:*:*:*:*:* Versions before 8.0.9 Vulnerable ·zeek

Remediation

  • Fix · CNA zeek (zeek) Fixed in 8.0.9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    zeek 8.0.9

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-42831 Zeek < 8.0.9 Null Pointer Dereference DoS via Kerberos KRB_ERROR ParsingPriority MEDIUM 45
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-60108
  2. 2026-10-03 Alias added: GHSA-r3q8-ccf6-4xhj

References

Patch 1

Other 1

  • TI-2021-18391 An issue was discovered in zeek version 4.1.0. CVSS 3.1HIGH 8.2
  • TI-2026-42831 Zeek < 8.0.9 Null Pointer Dereference DoS via Kerberos KRB_ERROR Parsing CVSS 4.0HIGH 8.7
  • TI-2019-09093 In Zeek Network Security Monitor (formerly known as Bro) before 2.6.2, a NULL pointer… CVSS 3.0HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences