CVE-2019-11324The urllib3 library before 1.24.2 for Python mishandles certain cases where the desired set of CA certificates is different from the OS…
- 7.5HighCVSS base score
- 2.9%Exploitation in 30 daysEPSS · top 13% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The urllib3 library before 1.24.2 for Python mishandles certain cases where the desired set of CA certificates is different from the OS store of CA certificates, which results in SSL connections succeeding in situations where a verification failure is the correct outcome. This is related to use of the ssl_context, ca_certs, or ca_certs_dir argument.
Timeline
Published
- 5 years later
· 5 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 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 2.9% · top 13% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIurllib3GHSA-mh33-7rrq-662w (opens in a new tab)
References
References11
- https://github.com/urllib3/urllib3/compare/a6ec68a...1efadf4 (opens in a new tab)x_transferred
- [oss-security] 20190418 Re: urllib3: adds system certificates to ssl_context (opens in a new tab)mailing-listx_transferred
- USN-3990-1 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2019:2131 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2019:2133 (opens in a new tab)vendor-advisoryx_transferred
- RHSA-2019:3590 (opens in a new tab)vendor-advisoryx_transferred
- RHSA-2019:3335 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2020-6148c44137 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2020-d0d9ad17d8 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20210615 [SECURITY] [DLA 2686-1] python-urllib3 security update (opens in a new tab)mailing-listx_transferred
- [debian-lts-announce] 20231008 [SECURITY] [DLA 3610-1] python-urllib3 security update (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)
- EUVD EUVD-2019-0153 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-mh33-7rrq-662w (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-2019-11324)Record last updated .