MEDIUM

CVE-2019-11236

CVSS v3

6.1

MEDIUM

EPSS Score

2.1 %

exploit probability, as of 2026-10-17

CISA KEV

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.

Packages

urllib3PyPIall versions · fixed in 1.24.3
python2-attrsAlmaLinux:8all versions · fixed in 17.4.0-10.module_el8.6.0+2781+fed64c13
python2-chardetAlmaLinux:8all versions · fixed in 3.0.4-10.module_el8.6.0+2781+fed64c13
python2-coverageAlmaLinux:8all versions · fixed in 4.5.1-4.module_el8.6.0+2781+fed64c13
python2-CythonAlmaLinux:8all versions · fixed in 0.28.1-7.module_el8.6.0+2781+fed64c13
python2-dnsAlmaLinux:8all versions · fixed in 1.15.0-10.module_el8.6.0+2781+fed64c13
python2-docsAlmaLinux:8all versions · fixed in 2.7.16-2.module_el8.6.0+2781+fed64c13and 1 other package
python2-docutilsAlmaLinux:8all versions · fixed in 0.14-12.module_el8.6.0+2781+fed64c13

17 more package ranges on OSV.dev

Vendor advisories

CVE-2019-11236 Red Hat Product Security362 products fixed · 30 known affected
python-urllib3: CRLF injection due to not encoding the '\r\n' sequence leading to possible attack on internal service
python-urllib3.src as a component of Red Hat Enterprise Linux 6 · python-urllib3.src as a component of Red Hat OpenShift Container Platform 3.10 · python2-urllib3 as a component of Red Hat OpenShift Container Platform 3.10
RHBA-2020:2804 Red Hat Product Security2 products fixed
Red Hat Bug Fix Advisory: OpenShift Container Platform 4.3.28 packages update
RHBA-2020:2785 Red Hat Product Security2 products fixed
Red Hat Bug Fix Advisory: OpenShift Container Platform 4.4.11 packages update
RHSA-2020:2068 Red Hat Product Security8 products fixed
Red Hat Security Advisory: python-pip security update
RHSA-2020:2081 Red Hat Product Security8 products fixed
Red Hat Security Advisory: python-virtualenv security update
RHSA-2020:1605 Red Hat Product Security264 products fixed
Red Hat Security Advisory: python27:2.7 security, bug fix, and enhancement update

8 more advisories

Full record on NVD

Description

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

Technical details

Published: 2019-04-15

Frequently asked questions

What is CVE-2019-11236?

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

Is CVE-2019-11236 actively exploited?

Active exploitation of CVE-2019-11236 has not been confirmed. Its EPSS score was 2.1% on 2026-10-17, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-11236?

CVE-2019-11236 has a CVSS v3 base score of 6.1 (MEDIUM severity).

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