Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/vectordotdev/vector/commit/57fed991083c9a43d5fda2d5b3bf4718ae
- https://github.com/vectordotdev/vector/pull/25825
- https://github.com/vectordotdev/vector/releases/tag/v0.57.0
- https://github.com/vectordotdev/vector/security/advisories/GHSA-qp6f-fpfx-4gg6
FAQ
What is CVE-2026-77620?
CVE-2026-77620 is a documented vulnerability. 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. A...
How severe is CVE-2026-77620?
CVSS scoring is not yet available for CVE-2026-77620. Check NVD for updates.
Is there a patch for CVE-2026-77620?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.