Vulnerability-Lookup

FKIE_CVE-2026-1285

Vulnerability from fkie_nvd - Published: 2026-02-03 15:16 - Updated: 2026-02-04 17:09

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

References

URL	Tags
6a34fbeb-21d4-45e7-8e0a-62b95bc12c92	https://docs.djangoproject.com/en/dev/releases/security/	Vendor Advisory, Patch
6a34fbeb-21d4-45e7-8e0a-62b95bc12c92	https://groups.google.com/g/django-announce	Release Notes
6a34fbeb-21d4-45e7-8e0a-62b95bc12c92	https://www.djangoproject.com/weblog/2026/feb/03/security-releases/	Patch, Vendor Advisory

Impacted products

Vendor	Product	Version
djangoproject	django	*
djangoproject	django	*
djangoproject	django	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "59566A1F-D2C5-43D6-97AA-258EFD90B937",
              "versionEndExcluding": "4.2.28",
              "versionStartIncluding": "4.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "845BC013-1341-4D81-A5F1-507C814ABA7E",
              "versionEndExcluding": "5.2.11",
              "versionStartIncluding": "5.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4ACBCB7B-B8F4-4EEF-842D-0CCB8674BCD2",
              "versionEndExcluding": "6.0.2",
              "versionStartIncluding": "6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28.\n`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.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Seokchan Yoon for reporting this issue."
    },
    {
      "lang": "es",
      "value": "Se descubri\u00f3 un problema en 6.0 anterior a 6.0.2, 5.2 anterior a 5.2.11 y 4.2 anterior a 4.2.28.\nLos m\u00e9todos \u0027django.utils.text.Truncator.chars()\u0027 y \u0027Truncator.words()\u0027 (con \u0027html=True\u0027) y los filtros de plantilla \u0027truncatechars_html\u0027 y \u0027truncatewords_html\u0027 permiten a un atacante remoto causar una potencial denegaci\u00f3n de servicio mediante entradas manipuladas que contienen un gran n\u00famero de etiquetas de cierre HTML no coincidentes.\nSeries de Django anteriores y sin soporte (como 5.0.x, 4.1.x y 3.2.x) no fueron evaluadas y tambi\u00e9n pueden verse afectadas.\nDjango desea agradecer a Seokchan Yoon por informar de este problema."
    }
  ],
  "id": "CVE-2026-1285",
  "lastModified": "2026-02-04T17:09:01.357",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-03T15:16:13.570",
  "references": [
    {
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "tags": [
        "Vendor Advisory",
        "Patch"
      ],
      "url": "https://docs.djangoproject.com/en/dev/releases/security/"
    },
    {
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "tags": [
        "Release Notes"
      ],
      "url": "https://groups.google.com/g/django-announce"
    },
    {
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.djangoproject.com/weblog/2026/feb/03/security-releases/"
    }
  ],
  "sourceIdentifier": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-407"
        }
      ],
      "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
      "type": "Secondary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-02-03 14:35 – Updated: 2026-02-03 16:22

Title

Potential denial-of-service vulnerability in django.utils.text.Truncator HTML methods

Summary

Severity ?

No CVSS data available.

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

DSF

References

URL

Tags

	https://docs.djangoproject.com/en/dev/releases/se…	vendor-advisory
	https://groups.google.com/g/django-announce	mailing-list
	https://www.djangoproject.com/weblog/2026/feb/03/…	vendor-advisory

Impacted products

	Vendor	Product	Version
	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)

Credits

Seokchan Yoon Natalia Bidart Jacob Walls

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-1285",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-03T16:22:30.293747Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-03T16:22:33.352Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pypi.org/project/Django/",
          "defaultStatus": "unaffected",
          "packageName": "django",
          "product": "Django",
          "repo": "https://github.com/django/django/",
          "vendor": "djangoproject",
          "versions": [
            {
              "lessThan": "6.0.2",
              "status": "affected",
              "version": "6.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.0.2",
              "versionType": "semver"
            },
            {
              "lessThan": "5.2.11",
              "status": "affected",
              "version": "5.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.2.11",
              "versionType": "semver"
            },
            {
              "lessThan": "4.2.28",
              "status": "affected",
              "version": "4.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.2.28",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Seokchan Yoon"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Natalia Bidart"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Jacob Walls"
        }
      ],
      "datePublic": "2026-02-03T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAn issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28.\u003c/p\u003e\u003cp\u003e`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.\u003c/p\u003e\u003cp\u003eEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\u003c/p\u003e\u003cp\u003eDjango would like to thank Seokchan Yoon for reporting this issue.\u003c/p\u003e"
            }
          ],
          "value": "An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28.\n`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.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Seokchan Yoon for reporting this issue."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-130",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-130: Excessive Allocation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://docs.djangoproject.com/en/dev/internals/security/#security-issue-severity-levels",
              "value": "moderate"
            },
            "type": "Django severity rating"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-407",
              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-03T14:35:50.254Z",
        "orgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
        "shortName": "DSF"
      },
      "references": [
        {
          "name": "Django security archive",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://docs.djangoproject.com/en/dev/releases/security/"
        },
        {
          "name": "Django releases announcements",
          "tags": [
            "mailing-list"
          ],
          "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": "2026-01-20T18:00:00.000Z",
          "value": "Initial report received."
        },
        {
          "lang": "en",
          "time": "2026-01-22T18:00:00.000Z",
          "value": "Vulnerability confirmed."
        },
        {
          "lang": "en",
          "time": "2026-02-03T08:00:00.000Z",
          "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"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

FKIE_CVE-2026-1285

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

Tags

Sightings

Nomenclature