{"id":"CVE-2020-9493","title":"A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.","summary":"A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-502"],"vendor":"apache","product":"chainsaw","affected":["chainsaw < 2.1.0","log4j >= 1.2, < 2.0","reload4j < 1.2.18.1"],"patched":["chainsaw 2.1.0","log4j 2.0","reload4j 1.2.18.1"],"published":"2021-06-16","updated":"2026-10-07","sourceUpdated":"2026-10-07T16:17:30.130","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-9493","references":[{"url":"http://www.openwall.com/lists/oss-security/2021/06/16/1","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2022/01/18/5","label":"security@apache.org"},{"url":"https://lists.apache.org/thread.html/r50d389c613ba6062a26aa57e163c09bfee4ff2d95d67331d75265b83%40%3Cannounce.apache.org%3E","label":"security@apache.org"},{"url":"https://www.openwall.com/lists/oss-security/2021/06/16/1","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2021/06/16/1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2022/01/18/5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r50d389c613ba6062a26aa57e163c09bfee4ff2d95d67331d75265b83%40%3Cannounce.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openwall.com/lists/oss-security/2021/06/16/1","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-07T15:59:41.130111Z"},"epss":0.04612,"epssPercentile":0.9142,"ingestedAt":"2026-10-07T16:38:22.198Z","slug":"CVE-2020-9493","body":"## Overview\n\nA deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.\n\n## Affected\n\n- `chainsaw < 2.1.0`\n- `log4j >= 1.2, < 2.0`\n- `reload4j < 1.2.18.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `chainsaw 2.1.0`\n- `log4j 2.0`\n- `reload4j 1.2.18.1`","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":53.9,"likelihood":0.9,"exploitation":0,"ransomware":0},"changes":[]}