{"id":"CVE-2026-33267","state":"PUBLISHED","title":"Apache Traffic Server: Untrusted @ headers can spoof ATS internal metadata","description":"Improper Input Validation vulnerability in Apache Traffic Server.\n\nThis issue affects Apache Traffic Server: from 9.2.0 through 9.2.14, from 10.1.0 through 10.1.3.\n\nUsers are recommended to upgrade to version 9.2.15 or 10.1.4, which fixes the issue.","publishedAt":"2026-07-29T07:21:52.256Z","updatedAt":"2026-07-30T03:55:17.126Z","severity":{"score":7.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N","source":"apache"},"assigner":"apache","products":["Apache Software Foundation Apache Traffic Server"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Traffic Server","defaultStatus":"unaffected","versions":[{"version":"9.2.0","status":"affected","lessThanOrEqual":"9.2.14","versionType":"semver"},{"version":"10.1.0","status":"affected","lessThanOrEqual":"10.1.3","versionType":"semver"}]}],"references":["https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33267.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33267","state":"PUBLISHED","datePublished":"2026-07-29T07:21:52.256Z","dateUpdated":"2026-07-30T03:55:17.126Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-03-18T15:36:26.858Z"},"containers":{"cna":{"title":"Apache Traffic Server: Untrusted @ headers can spoof ATS internal metadata","descriptions":[{"lang":"en","value":"Improper Input Validation vulnerability in Apache Traffic Server.\n\nThis issue affects Apache Traffic Server: from 9.2.0 through 9.2.14, from 10.1.0 through 10.1.3.\n\nUsers are recommended to upgrade to version 9.2.15 or 10.1.4, which fixes the issue."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Traffic Server","defaultStatus":"unaffected","versions":[{"version":"9.2.0","status":"affected","lessThanOrEqual":"9.2.14","versionType":"semver"},{"version":"10.1.0","status":"affected","lessThanOrEqual":"10.1.3","versionType":"semver"}]}],"references":[{"url":"https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d","tags":["vendor-advisory"]}],"metrics":[{"other":{"content":{"text":"important"},"type":"Textual description of severity"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":10,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-07-29T07:21:52.256Z"},"credits":[{"lang":"en","type":"reporter","value":"Charlie Campbell"},{"lang":"en","type":"reporter","value":"Apache Community"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-29T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-33267"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-30T03:55:17.126Z"}}]}}}