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.
Metrics
CVSS 3.0 5.3/10
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://www.securityfocus.com/bid/103357Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2927Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0265Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00006.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3591-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4161Third Party Advisory
- https://www.djangoproject.com/weblog/2018/mar/06/security-releases/Release Notes, Vendor Advisory
- http://www.securityfocus.com/bid/103357Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2927Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0265Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00006.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3591-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4161Third Party Advisory
- https://www.djangoproject.com/weblog/2018/mar/06/security-releases/Release Notes, Vendor Advisory
Timeline
- Published
- Mar 9, 2018
- Last modified
- Jun 17, 2026
- NVD status
- Modified