CVE-2022-29225: Zip bomb vulnerability in Envoy

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-06-09 · updated 2026-06-17
Weakness: CWE-400

Description

Envoy is a cloud-native high-performance proxy. In versions prior to 1.22.1 secompressors accumulate decompressed data into an intermediate buffer before overwriting the body in the decode/encodeBody. This may allow an attacker to zip bomb the decompressor by sending a small highly compressed payload. Maliciously constructed zip files may exhaust system memory and cause a denial of service. Users are advised to upgrade. Users unable to upgrade may consider disabling decompression.

Affected products

envoyproxy envoy: before 1.22.1 — fixed in 1.22.1

How to fix

Upgrade to a fixed version: envoyproxy envoy 1.22.1. Check the vendor advisory for mitigations.

References

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