{"answers":{"affected":"6 open source packages ship an affected version, including fast-uri. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-13676 in the wild and no public exploit code.","fix":"Upgrade fast-uri to a fixed version for your release line: 2.4.2, 3.1.3 or 4.0.1.","what":"CVE-2026-13676 is a high-severity vulnerability in fast-uri, published on 29 Jun 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-2026-13676 and fix it if it is affected.\n\nWhat it is: CVE-2026-13676 is a high-severity vulnerability in fast-uri, published on 29 Jun 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-2026-13676 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- fast-uri (npm): affected from 2.3.1; fixed in 2.4.2\n- fast-uri (npm): affected from 2.3.1; fixed in 2.4.2\n- fast-uri (npm): affected from 3.0.0; fixed in 3.1.3\n- fast-uri (npm): affected from 3.0.0; fixed in 3.1.3\n- fast-uri (npm): affected from 4.0.0; fixed in 4.0.1\n- fast-uri (npm): affected from 4.0.0; fixed in 4.0.1\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-2026-13676/ (Markdown: https://insights.sbomify.com/CVE-2026-13676/index.md)","id":"CVE-2026-13676","markdown":"https://insights.sbomify.com/CVE-2026-13676/index.md","name":"CVE-2026-13676","record":{"aliases":["CLEANSTART-2026-AM69167","CLEANSTART-2026-QX93902","CLSA-2026-1792402819","DEBIAN-CVE-2026-13676","ECHO-d097-f100-ef64","GHSA-4c8g-83qw-93j6","MINI-2gpr-x365-m7vg","MINI-2mp5-r3hf-9pjc","MINI-2p5w-h2f2-6vr9","MINI-46pf-hfp3-xm3h","MINI-4c69-2fxv-f88m","MINI-5c42-9mxc-g9q2","MINI-5r98-g5fg-fmmj","MINI-64mp-443p-534m","MINI-66hg-65m6-872c","MINI-6m23-mwf2-34v4","MINI-6vp2-93vg-4h6p","MINI-7fmf-jx28-38q5","MINI-7wpx-v264-m48f","MINI-89qx-xxw9-3hqr","MINI-8cjx-f3gx-v2gr","MINI-8hf2-h23x-79wv","MINI-8jcq-fq9h-qp76","MINI-9qgc-frf7-gmqm","MINI-9x69-ghrp-5jv7","MINI-chhv-3xjq-mpwh","MINI-gj47-fvfw-xg4c","MINI-h8mf-ggjv-cp7r","MINI-hhf8-45qj-7x35","MINI-j438-4xfj-c386","MINI-jhcx-7r22-5cp6","MINI-p6g7-3gph-744v","MINI-qrj2-7h8p-9j4w","MINI-r9fw-94w8-h3wc","MINI-rr6c-hwfp-pjww","MINI-v267-xhj8-6xpv","MINI-v57x-3jp9-8rj3","MINI-v7ph-7v24-3fp9","MINI-vxw7-28x9-w3vv","MINI-w62h-c4ph-x269","MINI-w82q-w649-xp8v","MINI-xr82-xcjq-x2xv","MINI-xwvx-3jxj-f7mf","ROOT-APP-NPM-CVE-2026-13676","UBUNTU-CVE-2026-13676","openSUSE-SU-2026:11160-1","openSUSE-SU-2026:21231-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js URI library","requires_auth":"none","summary":"Attackers can bypass host-based security policies in applications using fast-uri by exploiting IDN canonicalization failures, leading to potential SSRF or access control bypasses.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"openjs","cpe":[{"product":"fast-uri","vendor":"openjsf"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-551","name":"Incorrect Behavior Order: Authorization Before Parsing and Canonicalization"},{"id":"CWE-436","name":"Interpretation Conflict"}],"description":"fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode (IDN) hostnames for HTTP-family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor, silently leaving the host in its original Unicode form while normalize() and equal() still return values that differ from a WHATWG-compatible URL parser. Applications that use fast-uri to enforce host-based policy (denylists, loopback filtering, redirect validation, outbound proxy routing) before passing the same URL to Node's URL or fetch can be bypassed when the two implementations resolve the same input to different hosts. Patches: upgrade to fast-uri 3.1.3 for the 3.x line or 4.0.1 for the 4.x line. Workarounds: enforce host policy using the same URL parser used for the actual request, or reject non-ASCII hosts before policy checks.","ecosystems":["npm","openSUSE:Leap 16.0","openSUSE:Tumbleweed"],"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 host confusion via failed IDN canonicalization","id":"CVE-2026-13676","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":8,"n_references":2,"next":{"headline":"SQL injection in DiskStation Manager (DSM)","id":"CVE-2026-13683"},"packages":[{"ecosystem":"npm","fixed":["2.4.2"],"introduced":["2.3.1"],"last_affected":[],"package":"fast-uri","purl":null,"source":"GHSA-4c8g-83qw-93j6"},{"ecosystem":"npm","fixed":["2.4.2"],"introduced":["2.3.1"],"last_affected":[],"package":"fast-uri","purl":"pkg:npm/fast-uri","source":"GHSA-4c8g-83qw-93j6"},{"ecosystem":"npm","fixed":["3.1.3"],"introduced":["3.0.0"],"last_affected":[],"package":"fast-uri","purl":null,"source":"GHSA-4c8g-83qw-93j6"},{"ecosystem":"npm","fixed":["3.1.3"],"introduced":["3.0.0"],"last_affected":[],"package":"fast-uri","purl":"pkg:npm/fast-uri","source":"GHSA-4c8g-83qw-93j6"},{"ecosystem":"npm","fixed":["4.0.1"],"introduced":["4.0.0"],"last_affected":[],"package":"fast-uri","purl":null,"source":"GHSA-4c8g-83qw-93j6"},{"ecosystem":"npm","fixed":["4.0.1"],"introduced":["4.0.0"],"last_affected":[],"package":"fast-uri","purl":"pkg:npm/fast-uri","source":"GHSA-4c8g-83qw-93j6"},{"ecosystem":"openSUSE:Leap 16.0","fixed":["0.16.1-bp160.3.1"],"introduced":["0"],"last_affected":[],"package":"python-pydata-sphinx-theme","purl":"pkg:rpm/opensuse/python-pydata-sphinx-theme\u0026distro=openSUSE%20Leap%2016.0","source":"openSUSE-SU-2026:21231-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.19.0-2.1"],"introduced":["0"],"last_affected":[],"package":"python-pydata-sphinx-theme","purl":"pkg:rpm/opensuse/python-pydata-sphinx-theme\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:11160-1"}],"prev":{"headline":"Missing authorization in DiskStation Manager (DSM)","id":"CVE-2026-13673"},"products":["fast-uri"],"published":"2026-06-29","related":[{"cvss_score":7.5,"headline":"fast-uri vulnerable to authority injection via an unvalidated port in serialize","id":"CVE-2026-84292","kev_date_added":null,"published":"2026-09-02"},{"cvss_score":7.5,"headline":"fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority","id":"CVE-2026-84394","kev_date_added":null,"published":"2026-09-02"},{"cvss_score":7.5,"headline":"fast-uri vulnerable to server-side request forgery via repeated hostname percent-decoding","id":"CVE-2026-75899","kev_date_added":null,"published":"2026-08-24"},{"cvss_score":7.5,"headline":"fast-uri vulnerable to host confusion via skipped IDN canonicalization on scheme-relative references","id":"CVE-2026-75931","kev_date_added":null,"published":"2026-08-24"},{"cvss_score":7.5,"headline":"fast-uri vulnerable to server-side request forgery via malformed IPv6 normalization","id":"CVE-2026-75975","kev_date_added":null,"published":"2026-08-24"},{"cvss_score":7.5,"headline":"fast-uri vulnerable to host confusion via percent-encoded scheme normalization","id":"CVE-2026-76172","kev_date_added":null,"published":"2026-08-24"},{"cvss_score":7.5,"headline":"fast-uri vulnerable to host confusion via backslash authority introducer","id":"CVE-2026-18446","kev_date_added":null,"published":"2026-07-31"}],"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":"SUSE","prefix":"openSUSE"},{"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":"2026-09-11","vendors":["fast-uri"]},"summary":"Attackers can bypass host-based security policies in applications using fast-uri by exploiting IDN canonicalization failures, leading to potential SSRF or access control bypasses.","url":"https://insights.sbomify.com/CVE-2026-13676/"}