CVE-2026-48044
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| envoyproxy | envoy | >= 1.38.0, < 1.38.1 | affected |
| envoyproxy | envoy | >= 1.37.0, < 1.37.3 | affected |
| envoyproxy | envoy | >= 1.36.0, < 1.36.7 | affected |
| envoyproxy | envoy | >= 1.23.0, < 1.35.11 | affected |
Weaknesses
- CWE-409: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.