CVE-2026-1285
Publication date 3 February 2026
Last updated 4 February 2026
Ubuntu priority
Description
An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28. `django.utils.text.Truncator.chars()` and `Truncator.words()` methods (with `html=True`) and the `truncatechars_html` and `truncatewords_html` template filters allow a remote attacker to cause a potential denial-of-service via crafted inputs containing a large number of unmatched HTML end tags. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Seokchan Yoon for reporting this issue.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| python-django | 25.10 questing |
Fixed 3:5.2.4-1ubuntu2.3
|
| 24.04 LTS noble |
Fixed 3:4.2.11-1ubuntu1.14
|
|
| 22.04 LTS jammy |
Fixed 2:3.2.12-2ubuntu1.25
|
|
| 20.04 LTS focal |
Fixed 2:2.2.12-1ubuntu0.29+esm7
|
|
| 18.04 LTS bionic |
Fixed 1:1.11.11-1ubuntu1.21+esm14
|
|
| 16.04 LTS xenial |
Fixed 1.8.7-1ubuntu5.15+esm11
|
|
| 14.04 LTS trusty |
Not affected
|
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| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-8009-1
- Django vulnerabilities
- 3 February 2026