High 7.5Published Oct 31, 2019

CVE-2019-5010An exploitable denial-of-service vulnerability exists in the X509 certificate parser of Python.org Python 2.7.11 / 3.6.6.

Updated under an hour ago (Oct 26, 2026, 3:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

python python python:python	from 2.7.0 before 2.7.16; from 3.4.0 before 3.4.10; from 3.5.0 before 3.5.7; from 3.6.0 before 3.6.9; from 3.7.0 before 3.7.3	NVD
opensuse leap opensuse:leap	15.1	NVD
debian debian_linux debian:debian_linux	9.0	NVD
redhat enterprise_linux redhat:enterprise_linux	8.0	NVD
redhat enterprise_linux_eus redhat:enterprise_linux_eus	8.1; 8.2; 8.4; 8.6	NVD
redhat enterprise_linux_server_aus redhat:enterprise_linux_server_aus	8.2; 8.4; 8.6	NVD
redhat enterprise_linux_server_tus redhat:enterprise_linux_server_tus	8.2; 8.4; 8.6	NVD

References

References

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html	mailing-list, third-party-advisory
https://access.redhat.com/errata/RHSA-2019:3520	third-party-advisory
https://access.redhat.com/errata/RHSA-2019:3725	third-party-advisory
https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html	mailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html	mailing-list, third-party-advisory
https://security.gentoo.org/glsa/202003-26	third-party-advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0758	exploit, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.