{"schemaVersion":3,"id":"MGASA-2026-0226","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated ruby-rack packages fix security vulnerabilities\n\nCVE-2026-26961 Greedy multipart boundary parsing can cause parser\ndifferentials and WAF bypass. `Forwarded` header semicolon injection\nenables `Host` and `Scheme` spoofing.\nCVE-2026-34230 Quadratic complexity in\n`Rack::Utils.select_best_encoding` via wildcard `Accept-Encoding`\nheader.\nCVE-2026-34763 Root directory disclosure via unescaped regex\ninterpolation in `Rack::Directory`.\nCVE-2026-34785 `Rack::Static` prefix matching can expose unintended\nfiles under the static root.\nCVE-2026-34786 `Rack::Static` `header_rules` bypass via URL-encoded path\nmismatch.\nCVE-2026-34826 Multipart byte range processing allows denial of service\nvia excessive overlapping ranges.\nCVE-2026-34827 Multipart header parsing allows denial of service via\nescape-heavy quoted parameters.\nCVE-2026-34829 Multipart parsing without `Content-Length` header allows\nunbounded chunked file uploads.\nCVE-2026-34830 `Rack::Sendfile` header-based `X-Accel-Mapping` regex\ninjection enables unauthorized `X-Accel-Redirect`.\nCVE-2026-34831 `Content-Length` mismatch in `Rack::Files` error\nresponses.\nCVE-2026-34835 `Rack::Request` accepts invalid Host characters, enabling\nhost allowlist bypass.","dates":{"published":"2026-06-18T21:28:22.000Z","modified":"2026-06-18T21:30:04.563Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"mageia","product":"ruby-rack","name":"ruby-rack","label":"ruby-rack","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/ruby-rack","purlType":"rpm","versions":[{"text":"< 2.2.23-1.mga9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.2.23-1.mga9","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2026-0226.html","label":"advisories.mageia.org/MGASA-2026-0226.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35446","label":"bugs.mageia.org/show_bug.cgi?id=35446","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-vgpv-f759-9wx3","label":"github.com/rack/rack/security/advisories/GHSA-vgpv-f759-9wx3","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-qfgr-crr9-7r49","label":"github.com/rack/rack/security/advisories/GHSA-qfgr-crr9-7r49","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-v569-hp3g-36wr","label":"github.com/rack/rack/security/advisories/GHSA-v569-hp3g-36wr","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-7mqq-6cf9-v2qp","label":"github.com/rack/rack/security/advisories/GHSA-7mqq-6cf9-v2qp","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-h2jq-g4cq-5ppq","label":"github.com/rack/rack/security/advisories/GHSA-h2jq-g4cq-5ppq","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-q4qf-9j86-f5mh","label":"github.com/rack/rack/security/advisories/GHSA-q4qf-9j86-f5mh","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-x8cg-fq8g-mxfx","label":"github.com/rack/rack/security/advisories/GHSA-x8cg-fq8g-mxfx","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-v6x5-cg8r-vv6x","label":"github.com/rack/rack/security/advisories/GHSA-v6x5-cg8r-vv6x","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-8vqr-qjwx-82mw","label":"github.com/rack/rack/security/advisories/GHSA-8vqr-qjwx-82mw","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-qv7j-4883-hwh7","label":"github.com/rack/rack/security/advisories/GHSA-qv7j-4883-hwh7","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-q2ww-5357-x388","label":"github.com/rack/rack/security/advisories/GHSA-q2ww-5357-x388","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/rack/rack/security/advisories/GHSA-g2pf-xv49-m2h5","label":"github.com/rack/rack/security/advisories/GHSA-g2pf-xv49-m2h5","hostname":"github.com","tags":["Advisory"]}],"lineage":{"upstream":["CVE-2026-26961","CVE-2026-32762","CVE-2026-34230","CVE-2026-34763","CVE-2026-34785","CVE-2026-34786","CVE-2026-34826","CVE-2026-34827","CVE-2026-34829","CVE-2026-34830","CVE-2026-34831","CVE-2026-34835"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-06-18T21:28:22.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-18T21:30:04.563Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T21:06:34.549Z","stale":false,"partial":false}}