{"id":"CVE-2026-115822","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-115822","generatedAt":"2026-10-28T02:24:01.952Z","title":"Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies.","description":"Starman versions before 0.4019 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies.\n\nStarman decodes chunked request bodies before calling the application, matching each chunk-size line with `s/^(([0-9a-fA-F]+).*\\015\\012)//`. A line of hex digits followed by a bare LF and then CRLF never matches, because `.` does not match LF, and each failed attempt backtracks in time quadratic in the length of the hex run. Nothing limits the length of the line.\n\nA remote attacker can exhaust worker CPU by sending such requests to any route.","published":"2026-10-25T17:17:02.000Z","lastModified":"2026-10-26T17:13:55.000Z","status":"Deferred","sourceIdentifier":"9b29abf9-4ab0-4765-b253-1875cd9b441e","cvss":null,"cwe":["CWE-1333"],"affected":[],"epss":{"score":0.00273,"percentile":0.19536,"date":"2026-10-26","history":[{"date":"2026-10-26","score":0.00273,"percentile":0.19536}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-25T17:17:02.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-25T17:17:01.637Z"},"summary":"New CVE, not yet scored."}],"references":[{"url":"https://github.com/miyagawa/Starman/commit/0f33f9b132b5e410d6cce722ff71988e22476acf.patch","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/MIYAGAWA/Starman-0.4019/changes","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-115822","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."}