{"answers":{"affected":"3 open source packages ship an affected version, including github.com/gofiber/fiber/v3. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-25891 in the wild and no public exploit code.","fix":"Upgrade github.com/gofiber/fiber/v3 to 3.1.0 or later.","what":"CVE-2026-25891 is a high-severity path traversal vulnerability in gofiber fiber, published on 24 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-25891 and fix it if it is affected.\n\nWhat it is: CVE-2026-25891 is a high-severity path traversal vulnerability in gofiber fiber, published on 24 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-25891 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/gofiber/fiber/v3 (Go): affected all versions; fixed in 3.1.0\n- github.com/gofiber/fiber/v3 (Go): affected all versions; fixed in 3.1.0\n- github.com/gofiber/fiber/v3 (Go): affected all versions; fixed in 3.1.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-25891/ (Markdown: https://insights.sbomify.com/CVE-2026-25891/index.md)","id":"CVE-2026-25891","markdown":"https://insights.sbomify.com/CVE-2026-25891/index.md","name":"CVE-2026-25891","record":{"aliases":["GHSA-m3c2-496v-cw3v","GO-2026-4540"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Go web framework","requires_auth":"none","summary":"A remote attacker can read arbitrary files on Windows servers by bypassing the static middleware sanitizer in the Fiber Go web framework.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"fiber","vendor":"gofiber"}],"cvss":{"score":7.7,"severity":"high","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Fiber has an Arbitrary File Read in Static Middleware on Windows","id":"CVE-2026-25891","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint","id":"CVE-2026-25892"},"packages":[{"ecosystem":"Go","fixed":["3.1.0"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v3","purl":null,"source":"GHSA-m3c2-496v-cw3v"},{"ecosystem":"Go","fixed":["3.1.0"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v3","purl":"pkg:golang/github.com/gofiber/fiber/v3","source":"GHSA-m3c2-496v-cw3v"},{"ecosystem":"Go","fixed":["3.1.0"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v3","purl":"pkg:golang/github.com/gofiber/fiber/v3","source":"GO-2026-4540"}],"prev":{"headline":"File Browser has a Path-Based Access Control Bypass via Multiple Leading Slashes in URL","id":"CVE-2026-25890"},"products":["fiber"],"published":"2026-02-24","related":[{"cvss_score":10,"headline":"Fiber Session Middleware Token Injection Vulnerability","id":"CVE-2024-38513","kev_date_added":null,"published":"2024-07-01"},{"cvss_score":10,"headline":"CSRF Token Reuse Vulnerability in fiber","id":"CVE-2023-45128","kev_date_added":null,"published":"2023-10-16"},{"cvss_score":9.4,"headline":"Fiber has Insecure CORS Configuration, Allowing Wildcard Origin with Credentials","id":"CVE-2024-25124","kev_date_added":null,"published":"2024-02-21"},{"cvss_score":9.2,"headline":"Fiber insecurely fallsback in utils.UUIDv4() / utils.UUID() — predictable / zero‑UUID on crypto/rand failure","id":"CVE-2025-66630","kev_date_added":null,"published":"2026-02-09"},{"cvss_score":8.7,"headline":"Fiber Susceptible to Crash via `BodyParser` Due to Unvalidated Large Slice Index in Decoder","id":"CVE-2025-54801","kev_date_added":null,"published":"2025-08-05"},{"cvss_score":8.6,"headline":"CSRF Token Validation Vulnerability in fiber","id":"CVE-2023-45141","kev_date_added":null,"published":"2023-10-16"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-24","vendors":["gofiber"]},"summary":"A remote attacker can read arbitrary files on Windows servers by bypassing the static middleware sanitizer in the Fiber Go web framework.","url":"https://insights.sbomify.com/CVE-2026-25891/"}