{"id":"CVE-2026-33930","title":"Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled.\n\n\n\nThis issue affects Apache…","summary":"Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled.\n\n\n\nThis issue affects Apache…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-121"],"vendor":"apache","product":"traffic_server","affected":["traffic_server >= 8.0.0, <= 8.1.9","traffic_server >= 9.0.0, < 9.2.15","traffic_server >= 10.0.0, < 10.1.4"],"patched":["traffic_server 10.1.4"],"published":"2026-07-29","updated":"2026-10-01","sourceUpdated":"2026-10-01T17:17:23.520","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-33930","references":[{"url":"https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d","label":"security@apache.org"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-29T13:10:04.022306Z"},"epss":0.00584,"epssPercentile":0.45938,"ingestedAt":"2026-10-01T18:55:42.323Z","slug":"CVE-2026-33930","body":"## Overview\n\nApache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled.\n\n\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.\n\n\n\nUsers are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.\n\n## Affected\n\n- `traffic_server >= 8.0.0, <= 8.1.9`\n- `traffic_server >= 9.0.0, < 9.2.15`\n- `traffic_server >= 10.0.0, < 10.1.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `traffic_server 10.1.4`","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}