What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-22 · updated 2026-09-24
• Weakness: CWE-130

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.

Affected products

• vectordotdev vector: from 0.15.0, < 0.57.0

References

• 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

Get alerted when CVE-2026-77619 or the next vulnerability affects your stack