High

Square OkHttp can accept the wrong certificate

Disclosed: 24.05.2022
Updated: 11.10.2026 13:19

In verifyHostName of OkHostnameVerifier.java, there is a possible way to accept a certificate for the wrong domain due to improperly used crypto. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11 Android ID: A-171980069

Affected software

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Platform	Package	Vulnerable versions	Fixed in
Java / Kotlin (Maven)	com.squareup.okhttp3:okhttp	< 4.9.2	4.9.2

References

CVSS score 7.5/10

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-295
Platform: Java / Kotlin (Maven)
Package: com.squareup.okhttp3:okhttp
Disclosed: 24.05.2022
Updated: 11.10.2026 13:19

Sources and licenses

OSV / GitHub Advisory Database - GHSA-3cqm-mf7h-prrj - CC BY 4.0

Vulnerability history: com.squareup.okhttp3:okhttp

All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries: 2
First → latest: 05.2022 05.2022
Without a fix: 0
Exploited in attacks: 0

Severity breakdown

High 1
Medium 1

Disclosures per year

2022: 2
2023: 0
2024: 0
2025: 0
2026: 0

24.05.2022

Square OkHttp can accept the wrong certificate this entry

High · 7.5 CVE-2021-0341 < 4.9.2 4.9.2
13.05.2022

Improper Certificate Validation in OkHttp

Medium · 5.9 CVE-2016-2402 < 2.7.4, >= 3.0.0, < 3.1.2 2.7.4, 3.1.2

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