CVE-2023-3782: DoS of the OkHttp client when using a BrotliInterceptor and surfing to a malicious web server, or when an attacker can perform MitM to inject a Brotli zip-bomb into an HTTP response

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-07-19 · updated 2026-06-17
Weakness: CWE-400

Description

DoS of the OkHttp client when using a BrotliInterceptor and surfing to a malicious web server, or when an attacker can perform MitM to inject a Brotli zip-bomb into an HTTP response

Affected products

Squareup Okhttp-Brotli: all versions

References

https://github.com/square/okhttp/issues/7738
https://research.jfrog.com/vulnerabilities/okhttp-client-brotli-dos/
https://github.com/square/okhttp/issues/7738
https://research.jfrog.com/vulnerabilities/okhttp-client-brotli-dos/

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