Technology · PyPI
pyopenssl (PyPI) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 5 vulnerabilities in pyopenssl (PyPI): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-27459, was published on 18 March 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 1
- Exploited in the wild
- 0
About pyopenssl (PyPI)
Python wrapper for OpenSSL library providing SSL/TLS functionality.
Latest pyopenssl (PyPI) vulnerabilities
- CVE-2026-27459: pyOpenSSL buffer overflow in DTLS cookie generation callbackcriticalCVSS 9.8EPSS 0.9%
- CVE-2026-27448: PYSEC-2026-2268 - pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to…mediumCVSS 4EPSS 0.4%
- CVE-2018-1000807: PYSEC-2018-23 - Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After…lowCVSS 3.1EPSS 4.1%
- CVE-2018-1000808: PYSEC-2018-24 - Python Cryptographic Authority pyopenssl version Before 17.5.0 contains a CWE - 401 : Failure to Release…lowCVSS 3EPSS 1.9%
- CVE-2013-4314: PYSEC-2013-31 - The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '\0' character in a domain name in…lowCVSS 3.1EPSS 1.2%
Most severe pyopenssl (PyPI) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-27459: pyOpenSSL buffer overflow in DTLS cookie generation callbackcriticalCVSS 9.8EPSS 0.9%
- CVE-2026-27448: PYSEC-2026-2268 - pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 0.14.0 and prior to…mediumCVSS 4EPSS 0.4%
- CVE-2018-1000807: PYSEC-2018-23 - Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After…lowCVSS 3.1EPSS 4.1%
- CVE-2013-4314: PYSEC-2013-31 - The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '\0' character in a domain name in…lowCVSS 3.1EPSS 1.2%
- CVE-2018-1000808: PYSEC-2018-24 - Python Cryptographic Authority pyopenssl version Before 17.5.0 contains a CWE - 401 : Failure to Release…lowCVSS 3EPSS 1.9%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/pypi-pyopenssl.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "pyopenssl (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/pypi-pyopenssl, 28 September 2026.