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LOW

django: Catastrophic backtracking in regular expressions via 'truncatechars_html' and 'truncatewords_html'

Published Mar 9, 2018

Description

An issue was discovered in Django 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.

Affected products

Remediation

Red Hat statement

This issue affects the versions of django as shipped with Red Hat Subscription Asset Manager. Red Hat Product Security has rated this issue as having security impact of Moderate. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Metrics

Weaknesses (2)

CWE-1333

CWE-185

References (16)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Mar 9, 2018
Updated Aug 5, 2024
Reserved Feb 26, 2018
Link CVE-2018-7537
CISA Vulnrichment
Updated n/a
NVD
Status Modified
Modified Jun 17, 2026
Link CVE-2018-7537
Red Hat
Severity Moderate
Public date Mar 6, 2018
Links CVE-2018-7537 - Bugzilla
GHSA-2F9X-5V75-3QV4