{"id":"CVE-2026-118485","aliases":["DEBIAN-CVE-2026-118485","EUVD-2026-112024","GHSA-gww9-3rx9-535x"],"status":"published","title":"Axel Download Accelerator Path Traversal via URL Filename Decoding","description":"Axel Download Accelerator 2.17.14 and earlier performs URL percent-decoding (http_decode()) on the output filename after the URL has been parsed and the filename component extracted. This allows an attacker to embed %2e%2e%2f (URL-encoded ../) sequences in the URL path. These sequences survive the URL parser intact (they contain no literal / characters) but are decoded into directory traversal sequences before the output file is opened for writing. As a result, a crafted URL can cause axel to write downloaded content to arbitrary filesystem paths relative to the current working directory.","severity":{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0056,"percentile":0.47091,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-24"],"published":"2026-10-28T11:26:59Z","modified":"2026-11-06T18:37:36Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"axel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.17.11-3","2.17.13-1","2.17.14-1","2.17.14-2","2.17.14-3","2.17.14-3.1","2.17.14-4"]},{"source":"osv","ecosystem":"Debian:13","package":"axel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.17.14-2","2.17.14-3","2.17.14-3.1","2.17.14-4"]},{"source":"osv","ecosystem":"Debian:14","package":"axel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.17.14-2","2.17.14-3","2.17.14-3.1","2.17.14-4"]}],"products":[{"vendor":"axel download accelerator","product":"axel"}],"references":[{"url":"https://github.com/axel-download-accelerator/axel/issues/477","tags":["issue-tracking","report"]},{"url":"https://github.com/axel-download-accelerator/axel/pull/483/changes/4e76e1a1dd1c4ea11b445e2c45e4ee257c76314e","tags":["patch","fix"]},{"url":"https://github.com/axel-download-accelerator/axel/milestone/22","tags":["vendor-advisory","advisory"]},{"url":"https://advisories.orangecyberdefense.com/advisories/167","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118485","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-gww9-3rx9-535x"},{"url":"https://github.com/axel-download-accelerator/axel/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118485.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-118485","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-118485","title":"Axel Download Accelerator Path Traversal via URL Filename Decoding","description":"Axel Download Accelerator 2.17.14 and earlier performs URL percent-decoding (http_decode()) on the output filename after the URL has been parsed and the filename component extracted. This allows an attacker to embed %2e%2e%2f (URL-encoded ../) sequences in the URL path. These sequences survive the URL parser intact (they contain no literal / characters) but are decoded into directory traversal sequences before the output file is opened for writing. As a result, a crafted URL can cause axel to write downloaded content to arbitrary filesystem paths relative to the current working directory.","status":"published","published":"2026-10-28T11:26:59.053Z","modified":"2026-11-06T18:37:36.239Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-24"],"updated_at":"2026-11-06T19:59:18.98792Z"}],"euvd":[{"id":"EUVD-2026-112024","description":"Axel Download Accelerator 2.17.14 and earlier performs URL percent-decoding (http_decode()) on the output filename after the URL has been parsed and the filename component extracted. This allows an attacker to embed %2e%2e%2f (URL-encoded ../) sequences in the URL path. These sequences survive the URL parser intact (they contain no literal / characters) but are decoded into directory traversal sequences before the output file is opened for writing. As a result, a crafted URL can cause axel to write downloaded content to arbitrary filesystem paths relative to the current working directory.","status":"published","published":"2026-10-28T11:26:59Z","modified":"2026-11-06T18:37:36Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-06T20:06:05.664912Z"}],"ghsa":[{"id":"GHSA-gww9-3rx9-535x","title":"Axel Download Accelerator 2.17.14 and earlier performs URL percent-decoding (http_decode()) on...","description":"Axel Download Accelerator 2.17.14 and earlier performs URL percent-decoding (http_decode()) on the output filename after the URL has been parsed and the filename component extracted. This allows an attacker to embed %2e%2e%2f (URL-encoded ../) sequences in the URL path. These sequences survive the URL parser intact (they contain no literal / characters) but are decoded into directory traversal sequences before the output file is opened for writing. As a result, a crafted URL can cause axel to write downloaded content to arbitrary filesystem paths relative to the current working directory.","status":"published","published":"2026-10-28T12:31:08Z","modified":"2026-10-28T12:31:16Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/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":"high"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high"}],"cwes":["CWE-24"],"updated_at":"2026-11-02T15:14:34.063838Z"}],"nvd":[{"id":"CVE-2026-118485","description":"Axel Download Accelerator 2.17.14 and earlier performs URL percent-decoding (http_decode()) on the output filename after the URL has been parsed and the filename component extracted. This allows an attacker to embed %2e%2e%2f (URL-encoded ../) sequences in the URL path. These sequences survive the URL parser intact (they contain no literal / characters) but are decoded into directory traversal sequences before the output file is opened for writing. As a result, a crafted URL can cause axel to write downloaded content to arbitrary filesystem paths relative to the current working directory.","status":"published","published":"2026-10-28T12:17:40.37Z","modified":"2026-11-06T19:17:38.567Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/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":"high","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-24"],"updated_at":"2026-11-06T22:02:15.358384Z"}],"osv":[{"id":"CVE-2026-118485","title":"Axel Download Accelerator Path Traversal via URL Filename Decoding","description":"Axel Download Accelerator 2.17.14 and earlier performs URL percent-decoding (http_decode()) on the output filename after the URL has been parsed and the filename component extracted. This allows an attacker to embed %2e%2e%2f (URL-encoded ../) sequences in the URL path. These sequences survive the URL parser intact (they contain no literal / characters) but are decoded into directory traversal sequences before the output file is opened for writing. As a result, a crafted URL can cause axel to write downloaded content to arbitrary filesystem paths relative to the current working directory.","status":"published","published":"2026-10-28T11:26:59.053Z","modified":"2026-11-08T02:30:27.199865944Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-24"],"updated_at":"2026-11-07T11:15:38.581573Z"},{"id":"DEBIAN-CVE-2026-118485","description":"Axel Download Accelerator 2.17.14 and earlier performs URL percent-decoding (http_decode()) on the output filename after the URL has been parsed and the filename component extracted. This allows an attacker to embed %2e%2e%2f (URL-encoded ../) sequences in the URL path. These sequences survive the URL parser intact (they contain no literal / characters) but are decoded into directory traversal sequences before the output file is opened for writing. As a result, a crafted URL can cause axel to write downloaded content to arbitrary filesystem paths relative to the current working directory.","status":"published","published":"2026-10-28T12:17:40.37Z","modified":"2026-11-07T09:47:38.747950145Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/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":"high"}],"updated_at":"2026-11-07T10:14:19.880839Z"}]}}