{"answers":{"affected":"6 open source packages ship an affected version, including rack. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-25500 in the wild and no public exploit code.","fix":"Upgrade rack to a fixed version for your release line: 2.2.22, 3.1.20 or 3.2.5.","what":"CVE-2026-25500 is a medium-severity cross-site scripting vulnerability in rack, published on 18 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-25500 and fix it if it is affected.\n\nWhat it is: CVE-2026-25500 is a medium-severity cross-site scripting vulnerability in rack, published on 18 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-25500 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rack (RubyGems): affected all versions; fixed in 2.2.22\n- rack (RubyGems): affected all versions; fixed in 2.2.22\n- rack (RubyGems): affected from 3.0.0.beta1; fixed in 3.1.20\n- rack (RubyGems): affected from 3.0.0.beta1; fixed in 3.1.20\n- rack (RubyGems): affected from 3.2.0; fixed in 3.2.5\n- rack (RubyGems): affected from 3.2.0; fixed in 3.2.5\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-2026-25500/ (Markdown: https://insights.sbomify.com/CVE-2026-25500/index.md)","id":"CVE-2026-25500","markdown":"https://insights.sbomify.com/CVE-2026-25500/index.md","name":"CVE-2026-25500","record":{"aliases":["CLEANSTART-2026-IX45302","CLEANSTART-2026-ZK59017","DEBIAN-CVE-2026-25500","GHSA-whrj-4476-wvmp","MINI-245w-r8vc-rxp3","MINI-285j-m8h2-77m4","MINI-2j29-h6c2-4x94","MINI-3565-459v-qg35","MINI-3xmc-cc2j-8xp2","MINI-853p-5r44-r9cr","MINI-85r6-8v58-9xjh","MINI-9473-7v68-fwh8","MINI-cq3h-456p-gp46","MINI-g4xg-wm27-865j","MINI-gcgv-7335-2w5w","MINI-gjxr-2h7c-mjgp","MINI-gq5p-jwhq-7ccr","MINI-h2fx-xcp4-gjr5","MINI-h37r-r65w-2vcx","MINI-h3fq-f84f-7gg8","MINI-hm9g-98wj-v3r2","MINI-j7q7-fmpc-6qf8","MINI-jv42-3rv8-fvhq","MINI-r5j6-jh5f-j8hj","MINI-rj79-c5jg-45hx","MINI-vwj3-w4jg-vhfm","UBUNTU-CVE-2026-25500"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby web server interface","requires_auth":"low_privilege","summary":"Attackers can execute arbitrary JavaScript in victim browsers by placing files with javascript: names in directories served by Rack::Directory.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"rack","vendor":"rack"}],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory` generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the `javascript:` scheme (e.g. `javascript:alert(1)`), the generated index contains an anchor whose `href` is exactly `javascript:alert(1)`. Clicking the entry executes JavaScript in the browser (demonstrated with `alert(1)`). Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.","ecosystems":["RubyGems"],"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":"Rack's Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href","id":"CVE-2026-25500","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":6,"n_references":2,"next":{"headline":"Null dereference in smf","id":"CVE-2026-25501"},"packages":[{"ecosystem":"RubyGems","fixed":["2.2.22"],"introduced":["0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-whrj-4476-wvmp"},{"ecosystem":"RubyGems","fixed":["2.2.22"],"introduced":["0"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-whrj-4476-wvmp"},{"ecosystem":"RubyGems","fixed":["3.1.20"],"introduced":["3.0.0.beta1"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-whrj-4476-wvmp"},{"ecosystem":"RubyGems","fixed":["3.1.20"],"introduced":["3.0.0.beta1"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-whrj-4476-wvmp"},{"ecosystem":"RubyGems","fixed":["3.2.5"],"introduced":["3.2.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-whrj-4476-wvmp"},{"ecosystem":"RubyGems","fixed":["3.2.5"],"introduced":["3.2.0"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-whrj-4476-wvmp"}],"prev":{"headline":"terraform-provider-proxmox has insecure sudo recommendation in the documentation","id":"CVE-2026-25499"},"products":["rack"],"published":"2026-02-18","related":[{"cvss_score":7.5,"headline":"Rack: Local file inclusion in `Rack::Static` via URL Prefix Matching","id":"CVE-2026-34785","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":7.5,"headline":"Rack: Algorithmic-Complexity DoS in Rack::Multipart::Parser","id":"CVE-2026-34827","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":7.5,"headline":"Rack: Denial of Service via Unbounded Multipart File Upload Without Content-Length","id":"CVE-2026-34829","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":7.5,"headline":"Rack has a Directory Traversal via Rack:Directory","id":"CVE-2026-22860","kev_date_added":null,"published":"2026-02-18"},{"cvss_score":7.5,"headline":"Rack is vulnerable to a memory-exhaustion DoS through unbounded URL-encoded body parsing","id":"CVE-2025-61919","kev_date_added":null,"published":"2025-10-10"},{"cvss_score":7.5,"headline":"Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion)","id":"CVE-2025-61770","kev_date_added":null,"published":"2025-10-07"},{"cvss_score":7.5,"headline":"Rack's multipart parser buffers large non‑file fields entirely in memory, enabling DoS (memory exhaustion)","id":"CVE-2025-61771","kev_date_added":null,"published":"2025-10-07"}],"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":"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-18","vendors":["rack"]},"summary":"Attackers can execute arbitrary JavaScript in victim browsers by placing files with javascript: names in directories served by Rack::Directory.","url":"https://insights.sbomify.com/CVE-2026-25500/"}