CVE-2026-35192

import requests # Conceptual PoC for CVE-2026-35192 # This script demonstrates checking for the presence of the 'Vary' header in a response. TARGET_URL = "http://target-django-app.com/public-page" def check_cache_vary_header(): session = requests.Session() # Simulate a user with a session cookie session.cookies.set('sessionid', 'attacker_controlled_or_stolen_value') response = session.get(TARGET_URL) print(f"Status Code: {response.status_code}") print(f"Response Headers: {response.headers}") # Check if 'Vary' header includes 'Cookie' vary_header = response.headers.get('Vary', '') if 'Cookie' not in vary_header: print("[!] Potential Vulnerability: 'Vary: Cookie' is missing from response headers.") print(" This might allow the cache to serve the same response to different users.") else: print("[+] 'Vary: Cookie' is present.") if __name__ == "__main__": check_cache_vary_header()

{"cve": {"id": "CVE-2026-35192", "sourceIdentifier": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "published": "2026-05-05T16:16:12.383", "lastModified": "2026-05-07T14:20:37.053", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14.\nResponse headers do not vary on cookies if a session is not modified, but `SESSION_SAVE_EVERY_REQUEST` is `True`. A remote attacker can steal a user's session after that user visits a cached public page.\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 Cantina for reporting this issue."}], "metrics": {"cvssMetricV40": [{"source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 2.3, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-539"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.2.14", "matchCriteriaId": "5AD5B44B-7569-458C-8F44-3021D9CC577C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.0.5", "matchCriteriaId": "30ADB5F4-66B5-4015-BB55-CCB31106AB95"}]}]}], "references": [{"url": "https://docs.djangoproject.com/en/dev/releases/security/", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "tags": ["Vendor Advisory"]}, {"url": "https://groups.google.com/g/django-announce", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "tags": ["Third Party Advisory"]}, {"url": "https://www.djangoproject.com/weblog/2026/may/05/security-releases/", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "tags": ["Vendor Advisory"]}]}}