{"id":"CVE-2026-53878","state":"PUBLISHED","title":"Header injection possibility since DomainNameValidator accepted newlines in input","description":"An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16.\n`DomainNameValidator` does not prohibit newlines in domain names (unless used via a form field, since `CharField` strips newlines). If an application uses values with newlines in an HTTP response, header injection can occur. Django itself is unaffected because `HttpResponse` prohibits newlines in HTTP headers.\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 Bence Nagy for reporting this issue.","publishedAt":"2026-07-07T14:10:29.935Z","updatedAt":"2026-07-07T14:58:18.415Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","source":"DSF"},"assigner":"DSF","products":["djangoproject Django"],"affected":[{"vendor":"djangoproject","product":"Django","packageName":"django","defaultStatus":"unaffected","versions":[{"version":"6.0","status":"affected","lessThan":"6.0.7","versionType":"python"},{"version":"6.0.7","status":"unaffected","versionType":"python"},{"version":"5.2","status":"affected","lessThan":"5.2.16","versionType":"python"},{"version":"5.2.16","status":"unaffected","versionType":"python"}],"collectionURL":"https://pypi.org/project/Django/","repo":"https://github.com/django/django/"}],"references":["https://docs.djangoproject.com/en/dev/releases/security/","https://groups.google.com/g/django-announce","https://www.djangoproject.com/weblog/2026/jul/07/security-releases/"],"weaknesses":["CWE-144"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53878.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53878","state":"PUBLISHED","datePublished":"2026-07-07T14:10:29.935Z","dateUpdated":"2026-07-07T14:58:18.415Z","assignerShortName":"DSF","assignerOrgId":"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92","dateReserved":"2026-06-11T01:11:27.546Z"},"containers":{"cna":{"title":"Header injection possibility since DomainNameValidator accepted newlines in input","descriptions":[{"lang":"en","value":"An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16.\n`DomainNameValidator` does not prohibit newlines in domain names (unless used via a form field, since `CharField` strips newlines). 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Django itself is unaffected because `HttpResponse` prohibits newlines in HTTP headers.\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 Bence Nagy for reporting this issue."}],"affected":[{"vendor":"djangoproject","product":"Django","packageName":"django","defaultStatus":"unaffected","versions":[{"version":"6.0","status":"affected","lessThan":"6.0.7","versionType":"python"},{"version":"6.0.7","status":"unaffected","versionType":"python"},{"version":"5.2","status":"affected","lessThan":"5.2.16","versionType":"python"},{"version":"5.2.16","status":"unaffected","versionType":"python"}],"collectionURL":"https://pypi.org/project/Django/","repo":"https://github.com/django/django/"}],"references":[{"url":"https://docs.djangoproject.com/en/dev/releases/security/","name":"Django security archive","tags":["vendor-advisory"]},{"url":"https://groups.google.com/g/django-announce","name":"Django releases announcements","tags":["mailing-list"]},{"url":"https://www.djangoproject.com/weblog/2026/jul/07/security-releases/","name":"Django security releases issued: 6.0.7 and 5.2.16","tags":["vendor-advisory"]}],"metrics":[{"other":{"content":{"value":"low","namespace":"https://docs.djangoproject.com/en/dev/internals/security/#security-issue-severity-levels"},"type":"Django severity rating"}},{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM"}},{"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","baseScore":5.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-144","lang":"en","description":"CWE-144: Improper Neutralization of Line Delimiters","type":"CWE"}]}],"providerMetadata":{"shortName":"DSF","orgId":"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92","dateUpdated":"2026-07-07T14:10:29.935Z"},"impacts":[{"capecId":"CAPEC-34","descriptions":[{"lang":"en","value":"CAPEC-34: HTTP Response Splitting"}]}],"credits":[{"lang":"en","type":"reporter","value":"Bence Nagy"},{"lang":"en","type":"remediation developer","value":"Natalia Bidart"},{"lang":"en","type":"coordinator","value":"Jacob Walls"}],"timeline":[{"lang":"en","time":"2026-06-02T12:00:00.000Z","value":"Initial report received."},{"lang":"en","time":"2026-06-11T12:00:00.000Z","value":"Vulnerability confirmed."},{"lang":"en","time":"2026-07-07T09:00:00.000Z","value":"Security release issued."}],"datePublic":"2026-07-07T09:00:00.000Z","source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-07T14:58:12.426667Z","id":"CVE-2026-53878","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-07T14:58:18.415Z"}}]}}}