{"cve":"CVE-2026-25891","nvd":{"published":"2026-02-24T22:16:31.440","modified":"2026-06-17T10:25:23.377","status":"Analyzed","description":"Fiber is an Express inspired web framework written in Go. A Path Traversal (CWE-22) vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been patched in Fiber v3 version 3.1.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P","score":7.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-22"],"references":["https://github.com/gofiber/fiber/commit/59133702301c2ab7b776dd123b474cbd995f2c86","https://github.com/gofiber/fiber/pull/4064","https://github.com/gofiber/fiber/security/advisories/GHSA-m3c2-496v-cw3v"],"products":["gofiber:fiber"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-25891","score":0.00703,"percentile":0.53299,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-m3c2-496v-cw3v","url":"https://osv.dev/vulnerability/GHSA-m3c2-496v-cw3v","summary":"Fiber has an Arbitrary File Read in Static Middleware on Windows","modified":"2026-02-27T20:04:39Z","packages":[{"ecosystem":"Go","name":"github.com/gofiber/fiber/v3","purl":"pkg:golang/github.com/gofiber/fiber/v3","ranges":["<3.1.0"],"fixed":["3.1.0"]}]},{"id":"GO-2026-4540","url":"https://osv.dev/vulnerability/GO-2026-4540","summary":"Fiber has an Arbitrary File Read in Static Middleware on Windows in github.com/gofiber/fiber/v3","modified":"2026-02-26T19:11:12.151068Z","packages":[{"ecosystem":"Go","name":"github.com/gofiber/fiber/v3","purl":"pkg:golang/github.com/gofiber/fiber/v3","ranges":["<3.1.0"],"fixed":["3.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}