Affects widely used Logstash (Elastic) and can drop arbitrary files and potentially execute code, impacting IT infrastructure.
CVE-2026-33466
Path traversal in Logstash archive extraction enables file write, risk of RCE
Is CVE-2026-33466 being exploited?
Not confirmed. CVE-2026-33466 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.55% probability of exploitation in the next 30 days.
How severe is CVE-2026-33466?
CVE-2026-33466 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33466?
Yes. A fix has been recorded for CVE-2026-33466. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33466 affect?
CVE-2026-33466 affects Logstash. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33466?
Patch/upgrade when fixed; restrict or disable untrusted update paths
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Arbitrary file write with Logstash privileges; possible RCE in auto-reload setups.
Patch when possible
- affected>= 8.0.0 and <= 8.19.13
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.