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Vulnerability record · CVE-2026-77619 · published 22 September 2026

CVE-2026-77619: Vector is a high-performance observability data pipeline.

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.

8.7 CVSS 4.0 High EPSS 0.52% · top 57.9% CWE-130 · CWE-130CWE-789 · CWE-789 Awaiting Analysis
8.7CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
24 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/vectordotdev/vector/commit/3162ed1a2e5e8d3f210134607518a26aa01e1a37
https://github.com/vectordotdev/vector/pull/25819
https://github.com/vectordotdev/vector/releases/tag/v0.57.0
https://github.com/vectordotdev/vector/security/advisories/GHSA-rrfg-9487-mhp6

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2025-14847MongoDB Server heap memory disclosure via compressed protocol headersMismatched length fields in Zlib-compressed protocol headers let an unauthenticated client trigger a read of uninitialized heap memory in MongoDB Ser…KEVEPSS 83%analysed

Source: NIST National Vulnerability Database (record CVE-2026-77619), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.