CVE-2026-77620 PUBLISHED

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

Assigner: GitHub_M
Reserved: 20.08.2026 Published: 22.09.2026 Updated: 22.09.2026

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.

Metrics

CVSS 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
CVSS Score: 8.7

Product Status

Vendor vectordotdev
Product vector
Versions
  • Version >= 0.15.0, < 0.57.0 is affected

References

Problem Types

  • CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) CWE