{"id":"CVE-2026-75973","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-75973","generatedAt":"2026-10-28T01:51:01.916Z","title":"Improper Authentication vulnerability in Apache Tomcat.","description":"Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121.\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.\n\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.","published":"2026-09-23T12:17:06.000Z","lastModified":"2026-09-23T19:19:14.000Z","status":"Awaiting Analysis","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"cwe":["CWE-287"],"affected":[],"epss":{"score":0.00518,"percentile":0.43758,"date":"2026-10-26","history":[{"date":"2026-09-24","score":0.00238,"percentile":0.13216}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-09-23T16:45:12.000Z","detail":{"from":null,"score":"7.3","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.3 HIGH."},{"kind":"new","label":"New CVE","at":"2026-09-23T12:17:06.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-09-23T12:17:06.410Z"},"summary":"New CVE, high severity (CVSS 7.3)."}],"references":[{"url":"https://lists.apache.org/thread/njjcdkkzqyzx4n3ffc4ffjmyh5mpl1gr","source":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/23/20","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-75973","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}