{"id":"CVE-2026-121544","aliases":["EUVD-2026-115889","GHSA-xh68-jpqj-pv76"],"status":"published","title":"Koodo Reader through 2.4.6 Path Traversal via OPDS Cover and Download Handlers","description":"Koodo Reader through 2.4.6 contains a path traversal vulnerability in the self-hosted HTTP server's OPDS handlers that allows authenticated attackers to read files outside the upload directory. Attackers can upload a crafted books.db with a cover value containing ../ sequences, then request /opds/cover/{key} to read files accessible to the server process.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-14","score":0.00637,"percentile":0.51142,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2026-11-03T15:17:05Z","modified":"2026-11-04T02:47:48Z","products":[{"vendor":"koodo-reader","product":"koodo-reader"}],"references":[{"url":"https://github.com/koodo-reader/koodo-reader/issues/1654","tags":["issue-tracking","exploit","report"]},{"url":"https://github.com/koodo-reader/koodo-reader","tags":["product","package"]},{"url":"https://github.com/koodo-reader/koodo-reader/commit/cbc79a1ab5cbbd61c8252d6ab3cc6dbb694663b8","tags":["patch","fix"]},{"url":"https://github.com/koodo-reader/koodo-reader/blob/v2.4.6/httpserver/opds.go#L167-L194","tags":["technical-description","article"]},{"url":"https://github.com/koodo-reader/koodo-reader/blob/v2.4.6/httpserver/opds.go#L384-L431","tags":["technical-description","article"]},{"url":"https://github.com/koodo-reader/koodo-reader/compare/205539043b0a2afd9fd8bf99ef8434bd1833c2bf...cbc79a1ab5cbbd61c8252d6ab3cc6dbb694663b8","tags":["technical-description","article"]},{"url":"https://www.vulncheck.com/advisories/koodo-reader-through-2.4.6-path-traversal-via-opds-cover-and-download-handlers","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121544","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-xh68-jpqj-pv76"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121544.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-121544","title":"Koodo Reader through 2.4.6 Path Traversal via OPDS Cover and Download Handlers","description":"Koodo Reader through 2.4.6 contains a path traversal vulnerability in the self-hosted HTTP server's OPDS handlers that allows authenticated attackers to read files outside the upload directory. Attackers can upload a crafted books.db with a cover value containing ../ sequences, then request /opds/cover/{key} to read files accessible to the server process.","status":"published","published":"2026-11-03T15:17:05.228Z","modified":"2026-11-03T16:49:21.69Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-03T17:29:02.209656Z"}],"euvd":[{"id":"EUVD-2026-115889","description":"Koodo Reader through 2.4.6 contains a path traversal vulnerability in the self-hosted HTTP server's OPDS handlers that allows authenticated attackers to read files outside the upload directory. Attackers can upload a crafted books.db with a cover value containing ../ sequences, then request /opds/cover/{key} to read files accessible to the server process.","status":"published","published":"2026-11-03T15:17:05Z","modified":"2026-11-03T16:49:21Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-03T21:20:14.931402Z"}],"ghsa":[{"id":"GHSA-xh68-jpqj-pv76","title":"Koodo Reader through 2.4.6 contains a path traversal vulnerability in the self-hosted HTTP server...","description":"Koodo Reader through 2.4.6 contains a path traversal vulnerability in the self-hosted HTTP server's OPDS handlers that allows authenticated attackers to read files outside the upload directory. Attackers can upload a crafted books.db with a cover value containing ../ sequences, then request /opds/cover/{key} to read files accessible to the server process.","status":"published","published":"2026-11-03T18:31:03Z","modified":"2026-11-03T18:31:04Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-03T19:01:31.965978Z"}],"nvd":[{"id":"CVE-2026-121544","description":"Koodo Reader through 2.4.6 contains a path traversal vulnerability in the self-hosted HTTP server's OPDS handlers that allows authenticated attackers to read files outside the upload directory. Attackers can upload a crafted books.db with a cover value containing ../ sequences, then request /opds/cover/{key} to read files accessible to the server process.","status":"published","published":"2026-11-03T16:17:25.857Z","modified":"2026-11-03T17:18:10.353Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-22"],"updated_at":"2026-11-03T20:18:19.129968Z"}],"osv":[{"id":"CVE-2026-121544","title":"Koodo Reader through 2.4.6 Path Traversal via OPDS Cover and Download Handlers","description":"Koodo Reader through 2.4.6 contains a path traversal vulnerability in the self-hosted HTTP server's OPDS handlers that allows authenticated attackers to read files outside the upload directory. Attackers can upload a crafted books.db with a cover value containing ../ sequences, then request /opds/cover/{key} to read files accessible to the server process.","status":"published","published":"2026-11-03T15:17:05.228Z","modified":"2026-11-05T03:31:06.925116584Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-05T07:12:46.161235Z"}]}}