What is CVE-2023-3782?

CVE-2023-3782 is a medium-severity vulnerability in Squareup Okhttp-Brotli, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2023-07-19.

How severe is CVE-2023-3782?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Resource exhaustion in Squareup Okhttp-Brotli

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

Vulnerability class: DoS (Denial of Service)

Published 2023-07-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Squareup Okhttp-Brotli

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

github.com/square/okhttp/issues/7738 (Issue Tracking, Vendor Advisory)
research.jfrog.com/vulnerabilities/okhttp-client-brotli-dos/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-3782?: CVE-2023-3782 is a medium-severity vulnerability in Squareup Okhttp-Brotli, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2023-07-19.
How severe is CVE-2023-3782?: Medium severity. CVSS v3 base score is 5.9 out of 10.