Improper Certificate Validation Affecting com.squareup.okhttp3:okhttp package, versions [,4.9.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-COMSQUAREUPOKHTTP3-13961111
- published14 Nov 2025
- disclosed24 May 2022
- creditJérémie Bresson
Introduced: 24 May 2022
CVE-2021-0341 (opens in a new tab)How to fix?
Upgrade com.squareup.okhttp3:okhttp to version 4.9.2 or higher.
Overview
com.squareup.okhttp3:okhttp is a HTTP & HTTP/2 client for Android and Java applications
Affected versions of this package are vulnerable to Improper Certificate Validation via the verifyHostName function in OkHostnameVerifier.java. An attacker can gain unauthorized access to sensitive information by presenting a certificate for an incorrect domain, which is improperly accepted during cryptographic verification.