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HIGH

CVE-2019-5010

CVSS v3

7.5

HIGH

EPSS Score

20.7 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2019-5010 Red Hat Product Security273 products fixed · 8 known affected

    python: NULL pointer dereference using a specially crafted X509 certificate

    rh-python35-python as a component of Red Hat Software Collections · rh-python35-python-debug as a component of Red Hat Software Collections · rh-python35-python-devel as a component of Red Hat Software Collections

  • RHBA-2020:0547 Red Hat Product Security3 products fixed

    Red Hat Bug Fix Advisory: Container Image Rebuild for Ansible Tower 3.4 Dependency

  • RHSA-2019:3725 Red Hat Product Security135 products fixed

    Red Hat Security Advisory: rh-python36-python security, bug fix, and enhancement update

  • RHSA-2019:3520 Red Hat Product Security56 products fixed

    Red Hat Security Advisory: python3 security and bug fix update

  • RHSA-2019:2030 Red Hat Product Security79 products fixed

    Red Hat Security Advisory: python security and bug fix update

Full record on NVD

Description

An exploitable denial-of-service vulnerability exists in the X509 certificate parser of Python.org Python 2.7.11 / 3.6.6. A specially crafted X509 certificate can cause a NULL pointer dereference, resulting in a denial of service. An attacker can initiate or accept TLS connections using crafted certificates to trigger this vulnerability.

Technical details

Published
2019-10-31

Frequently asked questions

What is CVE-2019-5010?

An exploitable denial-of-service vulnerability exists in the X509 certificate parser of Python.org Python 2.7.11 / 3.6.6. A specially crafted X509 certificate can cause a NULL pointer dereference, resulting in a denial of service. An attacker can initiate or accept TLS connections using crafted certificates to trigger this vulnerability.

Is CVE-2019-5010 actively exploited?

Active exploitation of CVE-2019-5010 has not been confirmed. Its EPSS score was 20.7% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-5010?

CVE-2019-5010 has a CVSS v3 base score of 7.5 (HIGH severity).

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