PYSEC-2026-1304

Vulnerability from pysec - Published: 2026-07-07 14:34 - Updated: 2026-07-07 17:24
VLAI
Details

Versions of the package djangorestframework before 3.15.2 are vulnerable to Cross-site Scripting (XSS) via the break_long_headers template filter due to improper input sanitization before splitting and joining with
tags.

Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.1 (Low)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P
Impacted products
Name purl
djangorestframework pkg:pypi/djangorestframework
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "djangorestframework",
        "purl": "pkg:pypi/djangorestframework"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.15.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1",
        "0.1.1",
        "0.2.0",
        "0.2.1",
        "0.2.2",
        "0.2.3",
        "0.2.4",
        "0.3.0",
        "0.3.1",
        "0.3.2",
        "0.3.3",
        "0.4.0",
        "2.0.0",
        "2.0.1",
        "2.0.2",
        "2.1.0",
        "2.1.1",
        "2.1.10",
        "2.1.11",
        "2.1.12",
        "2.1.13",
        "2.1.14",
        "2.1.15",
        "2.1.16",
        "2.1.17",
        "2.1.2",
        "2.1.3",
        "2.1.4",
        "2.1.5",
        "2.1.6",
        "2.1.7",
        "2.1.8",
        "2.1.9",
        "2.2.0",
        "2.2.1",
        "2.2.2",
        "2.2.3",
        "2.2.4",
        "2.2.5",
        "2.2.6",
        "2.2.7",
        "2.3.0",
        "2.3.1",
        "2.3.10",
        "2.3.11",
        "2.3.12",
        "2.3.13",
        "2.3.14",
        "2.3.2",
        "2.3.3",
        "2.3.4",
        "2.3.5",
        "2.3.6",
        "2.3.7",
        "2.3.8",
        "2.3.9",
        "2.4.0",
        "2.4.1",
        "2.4.2",
        "2.4.3",
        "2.4.4",
        "2.4.5",
        "2.4.6",
        "2.4.7",
        "2.4.8",
        "3.0.0",
        "3.0.1",
        "3.0.2",
        "3.0.3",
        "3.0.4",
        "3.0.5",
        "3.1.0",
        "3.1.1",
        "3.1.2",
        "3.1.3",
        "3.10.0",
        "3.10.1",
        "3.10.2",
        "3.10.3",
        "3.11.0",
        "3.11.1",
        "3.11.2",
        "3.12.0",
        "3.12.1",
        "3.12.2",
        "3.12.3",
        "3.12.4",
        "3.13.0",
        "3.13.1",
        "3.14.0",
        "3.15.0",
        "3.15.1",
        "3.2.0",
        "3.2.1",
        "3.2.2",
        "3.2.3",
        "3.2.4",
        "3.2.5",
        "3.3.0",
        "3.3.1",
        "3.3.2",
        "3.3.3",
        "3.4.0",
        "3.4.1",
        "3.4.2",
        "3.4.3",
        "3.4.4",
        "3.4.5",
        "3.4.6",
        "3.4.7",
        "3.5.0",
        "3.5.1",
        "3.5.2",
        "3.5.3",
        "3.5.4",
        "3.6.0",
        "3.6.1",
        "3.6.2",
        "3.6.3",
        "3.6.4",
        "3.7.0",
        "3.7.1",
        "3.7.2",
        "3.7.3",
        "3.7.4",
        "3.7.5",
        "3.7.6",
        "3.7.7",
        "3.8.0",
        "3.8.1",
        "3.8.2",
        "3.9.0",
        "3.9.1",
        "3.9.2",
        "3.9.3",
        "3.9.4"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-21520",
    "GHSA-gw84-84pc-xp82"
  ],
  "details": "Versions of the package djangorestframework before 3.15.2 are vulnerable to Cross-site Scripting (XSS) via the break_long_headers template filter due to improper input sanitization before splitting and joining with \u003cbr\u003e tags.",
  "id": "PYSEC-2026-1304",
  "modified": "2026-07-07T17:24:02.429304Z",
  "published": "2026-07-07T14:34:35.497172Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21520"
    },
    {
      "type": "WEB",
      "url": "https://github.com/encode/django-rest-framework/pull/9435"
    },
    {
      "type": "WEB",
      "url": "https://github.com/encode/django-rest-framework/commit/3b41f0124194430da957b119712978fa2266b642"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/encode/django-rest-framework"
    },
    {
      "type": "WEB",
      "url": "https://github.com/encode/django-rest-framework/compare/3.15.1...3.15.2"
    },
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-PYTHON-DJANGORESTFRAMEWORK-7252137"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/djangorestframework"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-gw84-84pc-xp82"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Cross-site Scripting in djangorestframework"
}



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Nomenclature

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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