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Vulnerability record · CVE-2019-11236 · published 15 April 2019

CVE-2019-11236: Python urllib3 vulnerability

Python · Urllib3

In the urllib3 library through 1.24.1 for Python, CRLF injection is possible if the attacker controls the request parameter.

6.1 CVSS 3.0 Medium EPSS 2.1% · top 19.3% CWE-93 · CWE-93
6.1CVSS 3.0 base score, v2 4.3
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
30References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In the urllib3 library through 1.24.1 for Python, CRLF injection is possible if the attacker controls the request parameter.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html
https://access.redhat.com/errata/RHSA-2019:2272
https://access.redhat.com/errata/RHSA-2019:3335
https://access.redhat.com/errata/RHSA-2019:3590
https://github.com/urllib3/urllib3/issues/1553 ExploitIssue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00016.html
https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKGPJLVLVYCL4L4B4G5TIOT
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R62XGEYPUTXMRHGX5I37EBC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TBI45HO533KYHNB5YRO43TB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOSA2NT4DUQDBEIWE6O7KKD
https://usn.ubuntu.com/3990-1/
https://usn.ubuntu.com/3990-2/
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html
https://access.redhat.com/errata/RHSA-2019:2272
https://access.redhat.com/errata/RHSA-2019:3335
https://access.redhat.com/errata/RHSA-2019:3590
https://github.com/urllib3/urllib3/issues/1553 ExploitIssue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00016.html
https://lists.debian.org/debian-lts-announce/2021/06/msg00015.html
https://lists.debian.org/debian-lts-announce/2023/10/msg00012.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKGPJLVLVYCL4L4B4G5TIOT
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R62XGEYPUTXMRHGX5I37EBC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TBI45HO533KYHNB5YRO43TB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOSA2NT4DUQDBEIWE6O7KKD
https://usn.ubuntu.com/3990-1/
https://usn.ubuntu.com/3990-2/

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Source: NIST National Vulnerability Database (record CVE-2019-11236), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.