{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-100691 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-100691 is a medium-severity cross-site scripting vulnerability in gohugoio hugo, published on 26 Sep 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-2026-100691 and fix it if it is affected.\n\nWhat it is: CVE-2026-100691 is a medium-severity cross-site scripting vulnerability in gohugoio hugo, published on 26 Sep 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-2026-100691 in the wild and no public exploit code.\n\nAffected product: gohugoio hugo. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-100691/ (Markdown: https://insights.sbomify.com/CVE-2026-100691/index.md)","id":"CVE-2026-100691","markdown":"https://insights.sbomify.com/CVE-2026-100691/index.md","name":"CVE-2026-100691","record":{"aliases":["DEBIAN-CVE-2026-100691","GHSA-8v94-8989-vc79","GHSA-q4xf-287f-98r8","MINI-6h29-v3fx-96c7","MINI-6v2g-8j4v-cp5c","UBUNTU-CVE-2026-100691"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Static site generator","requires_auth":"low_privilege","summary":"Hugo static site generator allows stored XSS via unescaped lineAnchors in code blocks, enabling JavaScript execution in visitor browsers.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"hugo","vendor":"gohugo"}],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Hugo versions 0.75.0 through 0.165.x contain a stored cross-site scripting vulnerability: the syntax highlighter does not escape the `lineAnchors` option before passing it to Chroma, which writes the value verbatim into the `id` and `href` attributes of the generated line-number markup. A crafted `lineAnchors` value supplied as a Markdown code fence attribute (or passed to the `highlight` template function) results in unescaped HTML in the rendered page, allowing arbitrary JavaScript to execute in the browsers of visitors to the generated site. This affects sites that build and publish Markdown from untrusted contributors; Hugo's security model otherwise considers content trusted input. Fixed in 0.166.0, where the `lineAnchors` value is HTML-escaped before being passed to Chroma.","ecosystems":[],"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":"Hugo before 0.166.0 Stored XSS via lineAnchors code block option","id":"CVE-2026-100691","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Hugo before v0.166.0 Path Traversal via Symlinked Mount Roots","id":"CVE-2026-100692"},"packages":[],"prev":{"headline":"Hugo v0.161.0 to v0.165.0 Arbitrary File Read via Symlinks","id":"CVE-2026-100690"},"products":["hugo"],"published":"2026-09-26","related":[{"cvss_score":9.3,"headline":"Hugo 0.162.0 to 0.164.x - Node Permission Model Bypass via Default TailwindCSS Child-Process Grant","id":"CVE-2026-75926","kev_date_added":null,"published":"2026-08-18"},{"cvss_score":8.7,"headline":"Hugo v0.161.0 to v0.165.0 Arbitrary File Read via Symlinks","id":"CVE-2026-100690","kev_date_added":null,"published":"2026-09-26"},{"cvss_score":8.7,"headline":"Hugo before v0.166.0 Path Traversal via Symlinked Mount Roots","id":"CVE-2026-100692","kev_date_added":null,"published":"2026-09-26"},{"cvss_score":8.6,"headline":"Hugo v0.162.0 before v0.166.0 IP-literal Deny Rule Bypass","id":"CVE-2026-100693","kev_date_added":null,"published":"2026-09-26"},{"cvss_score":7.7,"headline":"Hugo can execute a binary from the current directory on Windows","id":"CVE-2020-26284","kev_date_added":null,"published":"2020-12-21"},{"cvss_score":6.9,"headline":"Hugo: Symlink confinement bypass in resources.Get","id":"CVE-2026-50135","kev_date_added":null,"published":"2026-07-06"},{"cvss_score":6.3,"headline":"Hugo: security.http.urls allow-list bypass via HTTP redirects","id":"CVE-2026-50134","kev_date_added":null,"published":"2026-07-06"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-09-28","vendors":["gohugoio"]},"summary":"Hugo static site generator allows stored XSS via unescaped lineAnchors in code blocks, enabling JavaScript execution in visitor browsers.","url":"https://insights.sbomify.com/CVE-2026-100691/"}