CVE-2026-109595

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{"bugzilla": {"description": "hugo: Hugo: Information disclosure via path traversal during asset compilation", "id": "2550056", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550056"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-22", "details": ["Hugo from v0.84.0 before v0.167.0 contains a path traversal vulnerability that allows malicious themes or modules to read files outside the project root via ESBuild's fallback resolver in js.Build, js.Batch, and css.Build. Attackers can ship relative imports or symlinks pointing outside the project to bundle any file readable by the build user into published JavaScript or CSS output.", "A flaw was found in Hugo. This vulnerability allows an attacker to cause unauthorized information disclosure through path traversal when processing untrusted themes or modules. By supplying relative file paths or symbolic links that reference locations outside the project directory, an attacker can cause arbitrary files readable by the build user to be incorporated into the published output during asset compilation."], "mitigation": {"lang": "en:us", "value": "Avoid compiling Hugo sites with untrusted themes or third-party modules. When processing unverified assets, execute builds within an isolated, unprivileged container environment with minimal directory mounts and read-only host access."}, "name": "CVE-2026-109595", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "grafana", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "grafana12.4", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "grafana13.1", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "grafana13.2", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "hugo", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift_gitops:1", "fix_state": "Fix deferred", "package_name": "openshift-gitops-1/argocd-rhel9", "product_name": "Red Hat OpenShift GitOps"}, {"cpe": "cpe:/a:redhat:openstack:18.0", "fix_state": "Fix deferred", "package_name": "rhoso-operators/openstack-operator-bundle", "product_name": "Red Hat OpenStack Platform 18.0"}], "public_date": "2026-10-12T22:21:50Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-109595\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-109595\nhttps://github.com/gohugoio/hugo/security/advisories/GHSA-r4xx-89rf-5424\nhttps://www.vulncheck.com/advisories/hugo-0.84.0-before-0.167.0-path-traversal-via-js-build-esbuild-resolver"], "statement": "A flaw was found in Hugo's asset compilation pipeline. When compiling themes or modules, the ESBuild fallback resolver utilized in functions such as js.Build, js.Batch, and css.Build fails to prevent path traversal when handling crafted relative imports or symbolic links. An attacker who convinces a user or automated CI/CD pipeline to build a site containing a malicious theme can leak arbitrary host files readable by the build user into the published CSS or JavaScript output.", "threat_severity": "Moderate"}

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