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CVE-2016-3739
The (1) mbed_connect_step1 function in lib/vtls/mbedtls.c and (2) polarssl_connect_step1 function in lib/vtls/polarssl.c in cURL and…
Medium5.3EPSS 6.9%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
The (1) mbed_connect_step1 function in lib/vtls/mbedtls.c and (2) polarssl_connect_step1 function in lib/vtls/polarssl.c in cURL and libcurl before 7.49.0, when using SSLv3 or making a TLS connection to a URL that uses a numerical IP address, allow remote attackers to spoof servers via an arbitrary valid certificate.
Timeline
ID reserved
By redhat
- 51 days later
· 51 days later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.3 | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 6.9% · top 5.9% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
n/a
- affected n/a
References (11)
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149 (opens in a new tab)x_transferred
- 1035907 (opens in a new tab)vdb-entryx_transferred
- https://curl.haxx.se/docs/adv_20160518.html (opens in a new tab)x_transferred
- SSA:2016-141-01 (opens in a new tab)vendor-advisoryx_transferred
- 90726 (opens in a new tab)vdb-entryx_transferred
- https://curl.haxx.se/CVE-2016-3739.patch (opens in a new tab)x_transferred
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 (opens in a new tab)x_transferred
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html (opens in a new tab)x_transferred
- GLSA-201701-47 (opens in a new tab)vendor-advisoryx_transferred
- https://curl.haxx.se/changes.html#7_49_0 (opens in a new tab)x_transferred
- [oss-security] 20240327 [SECURITY ADVISORY] curl: CVE-2024-2466: TLS certificate check bypass with mbedTLS (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-3739)Record last updated .