{"answers":{"affected":"6 open source packages ship an affected version, including fast-uri.","exploited":"There is no known exploitation of CVE-2026-110306 in the wild and no public exploit code.","fix":"Upgrade fast-uri to a fixed version for your release line: 2.4.8, 3.1.9 or 4.2.3.","what":"CVE-2026-110306 is a medium-severity vulnerability in fast-uri, published on 20 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-110306 and fix it if it is affected.\n\nWhat it is: CVE-2026-110306 is a medium-severity vulnerability in fast-uri, published on 20 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-110306 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- fast-uri (npm): affected all versions; fixed in 2.4.8\n- fast-uri (npm): affected all versions; fixed in 2.4.8\n- fast-uri (npm): affected from 3.0.0; fixed in 3.1.9\n- fast-uri (npm): affected from 3.0.0; fixed in 3.1.9\n- fast-uri (npm): affected from 4.0.0; fixed in 4.2.3\n- fast-uri (npm): affected from 4.0.0; fixed in 4.2.3\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-2026-110306/ (Markdown: https://insights.sbomify.com/CVE-2026-110306/index.md)","id":"CVE-2026-110306","markdown":"https://insights.sbomify.com/CVE-2026-110306/index.md","name":"CVE-2026-110306","record":{"aliases":["CLSA-2026-1792517925","CLSA-2026-1792523667","CLSA-2026-1792574767","CLSA-2026-1793097094","DEBIAN-CVE-2026-110306","ECHO-30a5-67ec-a694","GHSA-w74x-v6f9-j3xg","MINI-56q8-hcwx-p424","MINI-59jm-cxgr-fjjw","MINI-6jhg-3fm2-g98h","MINI-6vf9-qv49-2qvc","MINI-8jp6-rjx7-q8rm","MINI-m7fh-6732-xgxw","MINI-qf3g-7fp3-gm7p","MINI-v7g7-4j48-9x4h","UBUNTU-CVE-2026-110306"],"analysis":null,"analysis_generated_by":null,"assigner":"openjs","cpe":[],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-180","name":"Incorrect Behavior Order: Validate Before Canonicalize"},{"id":"CWE-172","name":"Improper Encoding or Decoding of Data"}],"description":"fast-uri is a dependency-free RFC 3986 URI parser and serializer for Node.js. In versions before 2.4.8, from 3.0.0 through 3.1.8, and from 4.0.0 through 4.2.2, fast-uri percent-decodes the scheme component with the legacy global unescape() function before validating it, so an input whose decoded scheme is a dangerous token is emitted as a live scheme even though RFC 3986 does not allow percent-encoding in a scheme and no other parser accepts it. An application that screens dangerous schemes on the raw input and then stores or renders the normalized or resolved result can turn an inert string into an executable javascript, data, or vbscript URL, producing a stored or reflected cross-site scripting vector, and the equal() comparison treats an encoded and a plain scheme as the same, which can bypass equality-based allowlists. The issue is fixed in fast-uri 2.4.8, 3.1.9, and 4.2.3, and users should upgrade to one of these versions or later. As a workaround, reject input whose scheme part contains a percent sign, or check the parsed scheme against an allowlist after normalization and use that same parsed result rather than the raw string.","ecosystems":["npm"],"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":"fast-uri vulnerable to URI scheme spoofing via percent-encoded scheme decoding","id":"CVE-2026-110306","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":6,"n_references":2,"next":{"headline":"Langflow OSS is affected by multiple vulnerabilities","id":"CVE-2026-110309"},"packages":[{"ecosystem":"npm","fixed":["2.4.8"],"introduced":["0"],"last_affected":[],"package":"fast-uri","purl":null,"source":"GHSA-w74x-v6f9-j3xg"},{"ecosystem":"npm","fixed":["2.4.8"],"introduced":["0"],"last_affected":[],"package":"fast-uri","purl":"pkg:npm/fast-uri","source":"GHSA-w74x-v6f9-j3xg"},{"ecosystem":"npm","fixed":["3.1.9"],"introduced":["3.0.0"],"last_affected":[],"package":"fast-uri","purl":null,"source":"GHSA-w74x-v6f9-j3xg"},{"ecosystem":"npm","fixed":["3.1.9"],"introduced":["3.0.0"],"last_affected":[],"package":"fast-uri","purl":"pkg:npm/fast-uri","source":"GHSA-w74x-v6f9-j3xg"},{"ecosystem":"npm","fixed":["4.2.3"],"introduced":["4.0.0"],"last_affected":[],"package":"fast-uri","purl":null,"source":"GHSA-w74x-v6f9-j3xg"},{"ecosystem":"npm","fixed":["4.2.3"],"introduced":["4.0.0"],"last_affected":[],"package":"fast-uri","purl":"pkg:npm/fast-uri","source":"GHSA-w74x-v6f9-j3xg"}],"prev":{"headline":"The PayPlug for WooCommerce (Official) WordPress plugin before 3.1.1 does not verify that the requester owns the WooCommerce order named in","id":"CVE-2026-110292"},"products":["fast-uri"],"published":"2026-10-20","related":[],"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":"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":"2026-10-20","vendors":["fast-uri"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-110306/"}