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CVE-2026-77619— Vector: Unauthenticated denial of service in the `logstash` source via unbounded memory allocation.

Quick assessment

Affected
vectordotdev vector
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vector is a high-performance observability data pipeline. From 0.15.0 until 0.57.0, the logstash source reads a 32-bit compressed-frame length from the network and uses it to size an in-memory buffer without an upper bound. An unauthenticated remote peer that

CVSS 8.7 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
vectordotdev vector >= 0.15.0, < 0.57.0 affected
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I. Basic Information for CVE-2026-77619

Vulnerability Information

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Vulnerability Title
Vector: Unauthenticated denial of service in the `logstash` source via unbounded memory allocation.
Source: CVE Program / CVE List V5
Vulnerability Description
Vector is a high-performance observability data pipeline. From 0.15.0 until 0.57.0, the logstash source reads a 32-bit compressed-frame length from the network and uses it to size an in-memory buffer without an upper bound. An unauthenticated remote peer that can reach the default 0.0.0.0:5044 listener can send a minimal frame declaring a multi-gigabyte payload, causing an excessive allocation that can abort Vector or invoke the host OOM killer. Because the allocation follows the declared length rather than bytes transmitted, the attacker has low resource cost, and process termination can halt log ingestion for every tenant on a shared pipeline. This issue is fixed in version 0.57.0.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
长度参数不一致性处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vectordotdev vector >= 0.15.0, < 0.57.0 -

II. Public POCs for CVE-2026-77619

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III. Intelligence Information for CVE-2026-77619

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Patches & Fixes for CVE-2026-77619 (1)

Other References for CVE-2026-77619 (2)

Same Patch Batch · vectordotdev · 2026-09-22 · 3 CVEs total

CVE-2026-77621 9.3 CRITICAL Vector: Arbitrary file write in the file sink via templated path (path traversal).
CVE-2026-77620 8.7 HIGH Vector: Unauthenticated denial of service in the `logstash` source via nested compressed f

IV. Related Vulnerabilities

Same product: vector
Same vendor: vectordotdev
Same weakness: CWE-130

V. Comments for CVE-2026-77619

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