{"id":"CVE-2026-3902","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-3902","generatedAt":"2026-10-28T01:10:14.188Z","title":"An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. `ASGIRequest` allows a remote attacker to spoof headers by exploiting an ambiguous mapping of two header variants (with hyphens or with underscores) to a single…","description":"An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30.\n`ASGIRequest` allows a remote attacker to spoof headers by exploiting an ambiguous mapping of two header variants (with hyphens or with underscores) to a single version with underscores.\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 Tarek Nakkouch for reporting this issue.","published":"2026-04-07T15:17:46.000Z","lastModified":"2026-10-26T21:10:00.000Z","status":"Analyzed","sourceIdentifier":"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-290"],"affected":["djangoproject/django"],"epss":{"score":0.00436,"percentile":0.37604,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://docs.djangoproject.com/en/dev/releases/security/","tags":["Patch","Vendor Advisory"],"source":"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92"},{"url":"https://groups.google.com/g/django-announce","tags":["Release Notes"],"source":"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92"},{"url":"https://www.djangoproject.com/weblog/2026/apr/07/security-releases/","tags":["Patch","Vendor Advisory"],"source":"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-3902","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}