{"api_version":"1","generated_at":"2026-06-02T17:42:07+00:00","cve":"CVE-2026-42795","urls":{"html":"https://cve.report/CVE-2026-42795","api":"https://cve.report/api/cve/CVE-2026-42795.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-42795","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-42795"},"summary":{"title":"Symlink Following in Hex Package Export Allows Embedding Files Outside Project Root","description":"Symlink following vulnerability in Gleam's Hex package export allows files outside the project root to be embedded in the generated package tarball.\n\nThe file collection helpers (gleam_files, native_files, private_files) in compiler-cli/src/fs.rs use follow_links(true) when walking publishable directories such as src/ and priv/. The collected paths are added to the package archive via add_path_to_tar in compiler-cli/src/publish.rs without verifying that the resolved target remains within the project root. A symlink placed under a publishable directory will cause gleam export hex-tarball or gleam publish to embed the contents of the symlink target into the generated Hex package.\n\nAn attacker with write access to the project repository can place a symlink in src/ or priv/ pointing to an arbitrary file. When a maintainer or CI pipeline runs gleam publish or gleam export hex-tarball, local files readable by the publisher (such as secrets, tokens, or SSH keys) are silently embedded into the published package artifact.\n\nThis issue affects Gleam from 0.10.0-rc1 until 1.17.0.","state":"PUBLISHED","assigner":"EEF","published_at":"2026-06-02 14:16:53","updated_at":"2026-06-02 16:16:40"},"problem_types":["CWE-59","CWE-59 CWE-59 Improper Link Resolution Before File Access ('Link 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(spect3r1)"},{"lang":"en","type":"finder","value":"Abdelrahman Ahmed Aboelkasem (0x2face)"},{"lang":"en","type":"remediation developer","value":"Louis Pilfold"},{"lang":"en","type":"analyst","value":"Jonatan Männchen / EEF"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Symlink following vulnerability in Gleam's Hex package export allows files outside the project root to be embedded in the generated package tarball.</p><p>The file collection helpers (<tt>gleam_files</tt>, <tt>native_files</tt>, <tt>private_files</tt>) in <tt>compiler-cli/src/fs.rs</tt> use <tt>follow_links(true)</tt> when walking publishable directories such as <tt>src/</tt> and <tt>priv/</tt>. 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When a maintainer or CI pipeline runs gleam publish or gleam export hex-tarball, local files readable by the publisher (such as secrets, tokens, or SSH keys) are silently embedded into the published package artifact.\n\nThis issue affects Gleam from 0.10.0-rc1 until 1.17.0."}],"impacts":[{"capecId":"CAPEC-132","descriptions":[{"lang":"en","value":"CAPEC-132 Symlink Attack"}]}],"metrics":[{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-59","description":"CWE-59 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