CVE-2016-2402

mediumpriority · track · 35EPSS 0.019 · 80 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

1.94% (80th) EPSS

CVSS 4.3 · medium

Is it mine?

21 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.15.9mediumAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV

v3.15.6mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimaryCWE-295USCWE-295US

exploits (2)

Public proof-of-concept and weaponised exploit code.

ikoz/cert-pinning-flaw-pocSimple script for testing CVE-2016-2402 and similar flawsPoC · poc_in_github
ikoz/certPinningVulnerableOkHttpOkHttp sample app vulnerable to CVE-2016-2402PoC · poc_in_github

affected products (21)

Products and version ranges known to be affected.

EMC Avamarall versionscert_bundDEcpe:/a:emc:avamar:-
Hitachi Ops Centerall versionscert_bundDEcpe:/a:hitachi:ops_center:-
Hitachi Ops Center <Analyzer 10.9.3-00all versionscert_bundDE
Hitachi Ops Center <Viewpoint 10.9.3-00all versionscert_bundDE
IBM DB2 11.1all versionscert_bundDEcpe:/a:ibm:db2:11.1
IBM DB2 11.5all versionscert_bundDEcpe:/a:ibm:db2:11.5
IBM SPSS Analytic Serverall versionscert_bundDEcpe:/a:ibm:spss:analytic_server
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Hitachi Ops Center< Analyzer 10.9.3-00cert_bundDE
Hitachi Ops Center< Viewpoint 10.9.3-00cert_bundDE
n/a n/a≤ n/aenisa_euvdEU
IBM Corp. IBM PureData System for Operational Analytics≤ 1.1fstec_bduRU
Square Co., Ltd. OKHttp≤ 3.1.1fstec_bduRU
Square Co., Ltd. OKHttp≤ 2.7.3fstec_bduRU
squareup okhttp≤ 2.7.3nvdUScpe:2.3:a:squareup:okhttp:*:*:*:*:*:*:*:*
squareup okhttp3= 3.0.0nvdUScpe:2.3:a:squareup:okhttp3:*:*:*:*:*:*:*:*
squareup okhttp3= 3.0.1nvdUScpe:2.3:a:squareup:okhttp3:*:*:*:*:*:*:*:*
squareup okhttp3= 3.1.0nvdUScpe:2.3:a:squareup:okhttp3:*:*:*:*:*:*:*:*
squareup okhttp3= 3.1.1nvdUScpe:2.3:a:squareup:okhttp3:*:*:*:*:*:*:*:*
Maven com.squareup.okhttp3:okhttp< 2.7.4osvUSpkg:maven/com.squareup.okhttp3/okhttp

showing 20 of 21

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-0770IBM DB2: Mehrere SchwachstellenDeutsch2020-04-23csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in IBM DB2 ausnutzen, um seine Privilegien zu erhöhen oder einen Denial of Service zu verursachen
GHSA-4hc2-jh7r-wrc3Improper Certificate Validation in OkHttp2022-05-13ghsa · osvUS
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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2017-01-30modified 2026-06-17

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+1886 more

references (22)

External citations — patches, advisories, analysis.

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