{"id":"CVE-2026-34475","state":"PUBLISHED","title":"Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cac","description":"Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.","publishedAt":"2026-03-27T19:40:28.397Z","updatedAt":"2026-03-27T20:01:11.327Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","source":"mitre"},"assigner":"mitre","products":["varnish-software Varnish Cache"],"affected":[{"vendor":"varnish-software","product":"Varnish Cache","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.0.17 LTS","versionType":"custom"},{"version":"7.0.0","status":"affected","lessThan":"8.0.1","versionType":"custom"}]}],"references":["https://vinyl-cache.org/security/VSV00018.html"],"weaknesses":["CWE-180"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34475.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34475","state":"PUBLISHED","datePublished":"2026-03-27T19:40:28.397Z","dateUpdated":"2026-03-27T20:01:11.327Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-03-27T19:40:27.986Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass."}],"affected":[{"vendor":"varnish-software","product":"Varnish Cache","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.0.17 LTS","versionType":"custom"},{"version":"7.0.0","status":"affected","lessThan":"8.0.1","versionType":"custom"}]}],"references":[{"url":"https://vinyl-cache.org/security/VSV00018.html"}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-180","description":"CWE-180 Incorrect Behavior Order: Validate Before Canonicalize","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-03-27T19:47:58.919Z"},"x_generator":{"engine":"CVE-Request-form 0.0.1"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:*:*:*:*","versionEndExcluding":"6.0.17 LTS"},{"vulnerable":true,"criteria":"cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.0","versionEndExcluding":"8.0.1"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-27T20:00:56.066373Z","id":"CVE-2026-34475","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":"2026-03-27T20:01:11.327Z"}}]}}}