Description
OkHttp before 2.7.4 and 3.x before 3.1.2 allows man-in-the-middle attackers to bypass certificate pinning by sending a certificate chain with a certificate from a non-pinned trusted CA and the pinned certificate.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
ikoz/cert-pinning-flaw-poc ★ 13 · Mar 20, 2016
Simple script for testing CVE-2016-2402 and similar flaws
-
ikoz/certPinningVulnerableOkHttp ★ 10 · Mar 30, 2016
OkHttp sample app vulnerable to CVE-2016-2402
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | com.squareup.okhttp3:okhttp | < 2.7.4 | 2.7.4 | GHSA-4hc2-jh7r-wrc3 |
| Maven | com.squareup.okhttp3:okhttp | >= 3.0.0, < 3.1.2 | 3.1.2 | GHSA-4hc2-jh7r-wrc3 |
Advisories 1
- WID-SEC-2022-0770 IBM DB2: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 8, 2026
References
- https://koz.io/pinning-cve-2016-2402/
- https://publicobject.com/2016/02/11/okhttp-certificate-pinning-vulnerability/
- [oss-security] 20160210 CVE request - OkHttp Certificate Pining Bypass mailing-list
- [oss-security] 20160217 Re: CVE request - OkHttp Certificate Pining Bypass mailing-list
- [pulsar-commits] 20201215 [GitHub] [pulsar] yanshuchong opened a new issue #8967: CVSS issue list mailing-list