http/impl/client/HttpClientBuilder.java in Apache HttpClient 4.3.x before 4.3.1 does not ensure that X509HostnameVerifier is not null, which allows attackers to have unspecified impact via vectors involving hostname verification
Published Oct 30, 2017
9.8
CRITICALCVSS 3.1
EPSS 3.31%
Description
http/impl/client/HttpClientBuilder.java in Apache HttpClient 4.3.x before 4.3.1 does not ensure that X509HostnameVerifier is not null, which allows attackers to have unspecified impact via vectors involving hostname verification.
Affected products
No data.
- 4.3
- 4.3
- 4.3
- 4.3
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.31% (0.03309) | 88.15th | v5 (v2026.06.15) |
| Sep 22, 2026 | 3.31% (0.03309) | 88.01th | v5 (v2026.06.15) |
| Sep 20, 2026 | 2.20% (0.02200) | 81.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.18% (0.02180) | 79.94th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.36% (0.01359) | 78.37th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.98% (0.04979) | 82.44th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.36% (0.01359) | 78.83th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.11% (0.00114) | 46.66th | v3 (v2023.03.01) |
| Jul 3, 2024 | 0.11% (0.00114) | 45.35th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00114) | 43.35th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
References (5)
- http://svn.apache.org/r1528614 x_refsource_CONFIRMIssue TrackingPatchRelease NotesVendor Advisory
- http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.3.x.txt x_refsource_CONFIRMIssue TrackingRelease NotesVendor Advisory
- https://github.com/advisories/GHSA-pqwh-44jj-p5rm Advisory
- https://github.com/apache/httpcomponents-client/commit/08140864e3e4c0994e094c4cf0507932baf6a66
- https://nvd.nist.gov/vuln/detail/CVE-2013-4366
| Link | Providers | Tags |
|---|---|---|
| http://svn.apache.org/r1528614 | x_refsource_CONFIRMIssue TrackingPatchRelease NotesVendor Advisory | |
| http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.3.x.txt | x_refsource_CONFIRMIssue TrackingRelease NotesVendor Advisory | |
| https://github.com/advisories/GHSA-pqwh-44jj-p5rm | Advisory | |
| https://github.com/apache/httpcomponents-client/commit/08140864e3e4c0994e094c4cf0507932baf6a66 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2013-4366 |
Change history (0)
No recorded changes yet.