CVE-2026-77620

Vector: Unauthenticated denial of service in the `logstash` source via nested compressed frames (stack exhaustion and decompression amplification).

Published Sep 22, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
Vector is a high-performance observability data pipeline. From 0.15.0 until 0.57.0, the logstash source feeds each decompressed frame back into its decoder without limiting nested compression depth. An unauthenticated remote peer that can reach the default 0.0.0.0:5044 listener can send many nested compressed frames, causing recursive decoding that exhausts the worker thread stack and aborts the process. The same nested construction amplifies decompressed input, and process termination can halt log ingestion for every tenant on a shared pipeline. This issue is fixed in version 0.57.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Vectordotdev
Vectordotdev vector
Vendors & Products Vectordotdev
Vectordotdev vector
Type Values Removed Values Added
Description Vector is a high-performance observability data pipeline. From 0.15.0 until 0.57.0, the logstash source feeds each decompressed frame back into its decoder without limiting nested compression depth. An unauthenticated remote peer that can reach the default 0.0.0.0:5044 listener can send many nested compressed frames, causing recursive decoding that exhausts the worker thread stack and aborts the process. The same nested construction amplifies decompressed input, and process termination can halt log ingestion for every tenant on a shared pipeline. This issue is fixed in version 0.57.0.
Title Vector: Unauthenticated denial of service in the `logstash` source via nested compressed frames (stack exhaustion and decompression amplification).
Weaknesses CWE-409
References
Metrics cvssV4_0

{'score': 8.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 22, 2026, 3:41 PM
Reserved
Aug 20, 2026, 8:52 PM
Status
Awaiting Analysis
Published
Sep 22, 2026, 4:17 PM
Modified
Sep 24, 2026, 9:23 PM