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CVE-2026-1285 (GCVE-0-2026-1285)

Vulnerability from cvelistv5 – Published: 2026-02-03 14:35 – Updated: 2026-02-03 16:22
VLAI
Title
Potential denial-of-service vulnerability in django.utils.text.Truncator HTML methods
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-03 16:22 UTC
CWE
  • CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
Vendor Product Version CPE status
djangoproject Django Affected: 6.0 , < 6.0.2 (semver)
Unaffected: 6.0.2 (semver)
Affected: 5.2 , < 5.2.11 (semver)
Unaffected: 5.2.11 (semver)
Affected: 4.2 , < 4.2.28 (semver)
Unaffected: 4.2.28 (semver)
guessed Create a notification for this product.
Date Public
2026-02-03 08:00
Credits
Seokchan Yoon Natalia Bidart Jacob Walls
Show details on NVD website
To clipboard 

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              "url": "https://groups.google.com/g/django-announce"
            },
            {
              "name": "Django security releases issued: 6.0.2, 5.2.11, and 4.2.28",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://www.djangoproject.com/weblog/2026/feb/03/security-releases/"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "timeline": [
            {
              "lang": "en",
              "time": "2026-01-20T18:00:00",
              "value": "Initial report received."
            },
            {
              "lang": "en",
              "time": "2026-01-22T18:00:00",
              "value": "Vulnerability confirmed."
            },
            {
              "lang": "en",
              "time": "2026-02-03T08:00:00",
              "value": "Security release issued."
            }
          ],
          "title": "Potential denial-of-service vulnerability in django.utils.text.Truncator HTML methods",
          "x_generator": {
            "engine": "cvelib 1.8.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
        "assignerShortName": "DSF",
        "cveId": "CVE-2026-1285",
        "datePublished": "2026-02-03T14:35:50.254Z",
        "dateReserved": "2026-01-21T12:49:21.258Z",
        "dateUpdated": "2026-02-03T16:22:33.352Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.