CVE-2026-1285
Potential denial-of-service vulnerability in django.utils.text.Truncator HTML methods
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.
How to fix CVE-2026-1285
To remediate CVE-2026-1285, upgrade the affected package to a fixed version below.
- —upgrade to 4.2.28 or later
- —upgrade to 2:2.2.28-1~deb11u12 or later
- —upgrade to 6.0.2 or later
- —upgrade to 4.2.28 or later
Is CVE-2026-1285 being exploited?
Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- >= 4.2.0, < 4.2.28, >= 5.2.0, < 5.2.11, >= 6.0.0, < 6.0.2
- from 0, < 2:2.2.28-1~deb11u12
- >= 6.0a1, < 6.0.2
- >= 4.2, < 4.2.28, >= 5.2, < 5.2.11, >= 6.0, < 6.0.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |