{"id":"GHSA-8xpq-cjcf-3wh9","revision":null,"records":[{"revision":"23a2a7934fd74a51997e84337129e8c4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-49401","aliases":[],"title":"Deno Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)","description":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.14, Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --deny-run, or --deny-ffi. On macOS, that comparison was done at the raw-byte level while the APFS filesystem treats different Unicode spellings of the same name as the same file. That means a program could reach a denied path by spelling it differently than the deny rule. This vulnerability is fixed in 2.7.14.","state":0,"publishedAt":"2026-06-23T17:22:32.266+00:00","modifiedAt":"2026-07-31T13:15:42.807+00:00","affected":[{"ecosystem":"Vendor product","name":"deno","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"denoland\",\n                    \"product\": \"deno\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.7.14\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","score":7.3,"severity":"HIGH"}],"references":["https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49401","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-49401","identifiers":["CVE-2026-49401"]},"retained":false,"historicalAffected":[]},{"revision":"a05370c7bc354e4b8be88d8f49d323c1","observedAt":"2026-11-07T11:31:40.446+00:00","statement":{"source":"euvd","id":"EUVD-2026-38547","aliases":["CVE-2026-49401","GHSA-8xpq-cjcf-3wh9"],"title":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.14, Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --de…","description":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.14, Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --deny-run, or --deny-ffi. On macOS, that comparison was done at the raw-byte level while the APFS filesystem treats different Unicode spellings of the same name as the same file. That means a program could reach a denied path by spelling it differently than the deny rule. This vulnerability is fixed in 2.7.14.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","score":7.3,"severity":null}],"references":["https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38547","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 23, 2026, 5:22:32 PM","dateUpdated":"Jul 31, 2026, 1:15:42 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-38547","identifiers":["EUVD-2026-38547","CVE-2026-49401","GHSA-8xpq-cjcf-3wh9"]},"retained":false,"historicalAffected":[]},{"revision":"5ce5d8d7e0dd4f4ca94eb3caf239ce1b","observedAt":"2026-10-27T13:11:58.28+00:00","statement":{"source":"nvd","id":"CVE-2026-49401","aliases":[],"title":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.14, Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --de…","description":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.14, Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --deny-run, or --deny-ffi. On macOS, that comparison was done at the raw-byte level while the APFS filesystem treats different Unicode spellings of the same name as the same file. That means a program could reach a denied path by spelling it differently than the deny rule. This vulnerability is fixed in 2.7.14.","state":0,"publishedAt":"2026-06-23T18:18:03.033+00:00","modifiedAt":"2026-10-25T23:10:00.167+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","score":7.3,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","score":8.4,"severity":"HIGH"}],"references":["https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-49401","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-41","CWE-176"],"productCriteria":["cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*","cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-06-23T18:18:03.033","lastModified":"2026-10-25T23:10:00.167"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-49401","identifiers":["CVE-2026-49401"]},"retained":false,"historicalAffected":[]},{"revision":"dae052de75544c5f83383743969cbbfc","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-8xpq-cjcf-3wh9","aliases":["CVE-2026-49401"],"title":"Deno: Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)","description":"## Summary\n\nDeno's permission system enforces filesystem and execution restrictions by\ncomparing the requested path against the path supplied to `--deny-read`,\n`--deny-write`, `--deny-run`, or `--deny-ffi`. On macOS, that comparison was\ndone at the raw-byte level while the APFS filesystem treats different Unicode\nspellings of the same name as the same file.\n\nThat means a program could reach a denied path by spelling it differently than\nthe deny rule. For example, with `--deny-read=/secrets/passwörter.txt`, a\nscript could still read the file by opening `/secrets/passwo\\u0308rter.txt`\n(NFD instead of NFC), or `/SECRETS/PASSWÖRTER.txt` (different case, since\ndefault APFS volumes are case-insensitive). Other forms include ligature\ncharacters (`fi` vs `fi`, `ff` vs `ff`, …) and German `ß` vs `ss`.\n\nThe denied path and the requested path differed at the byte level, so Deno's\npermission check passed; the kernel then resolved them to the same inode and\nserved the file anyway. The same flaw affected `--deny-write`, `--deny-run`,\nand `--deny-ffi`, which share the same path-comparison code.\n\n## Am I affected?\n\nYou are potentially affected if **all** of the following are true:\n\n1. You run Deno on **macOS** (the issue is specific to APFS path-equivalence\n   rules; Linux and Windows are not affected by this variant).\n2. You rely on `--deny-read`, `--deny-write`, `--deny-run`, or `--deny-ffi`\n   as a security boundary against less-trusted code — a dependency, plugin,\n   or attacker-controlled input.\n3. The protected path contains characters that have alternate Unicode\n   spellings — most commonly accented characters (`é`, `ñ`, `ö`, …), German\n   `ß`, or Latin ligatures — or you rely on case-sensitivity on a default\n   APFS volume.\n\nIf you only run fully trusted code, or your deny rules cover paths that are\npure ASCII with no case-sensitive aliases, you are not exposed to this\nspecific bypass.\n\n## Impact\n\nA program running with broad `--allow-read` (or `--allow-write` /\n`--allow-run` / `--allow-ffi`) but with `--deny-*` carve-outs for specific\npaths could read, write, execute, or load via FFI those denied paths by\nreferring to them through a Unicode- or case-equivalent spelling. The sandbox\nmodel on macOS was weaker than the flags suggested.\n\n## Workaround\n\nIf you cannot upgrade immediately:\n\n- Prefer `--allow-*` allowlists over `--deny-*` denylists. Allow rules match\n   against the original specifier, so an attacker-supplied alternate spelling\n   will not match a path you didn't explicitly grant.\n- Do not rely on case-sensitivity of paths on macOS for security boundaries;\n   default APFS volumes are case-insensitive.\n\n## Fix\n\nOn macOS, Deno now normalizes both the deny-rule path and the requested path\nto NFC and applies Unicode case folding before comparing them. This matches\nhow APFS resolves paths at the inode level, so byte-different but equivalent\nspellings are now rejected by the same deny rule.","state":0,"publishedAt":"2026-06-16T19:11:52+00:00","modifiedAt":"2026-07-31T13:30:13.0045184+00:00","affected":[{"ecosystem":"crates.io","name":"deno","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.7.14"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9","https://nvd.nist.gov/vuln/detail/CVE-2026-49401","https://github.com/denoland/deno"],"sourceUrl":"https://github.com/advisories/GHSA-8xpq-cjcf-3wh9","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-8xpq-cjcf-3wh9","identifiers":["GHSA-8xpq-cjcf-3wh9","CVE-2026-49401"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-cbfb00168958467aaa6015d5230faa08","complete":true,"records":13633,"lastAttemptAt":"2026-11-07T21:04:54.6100336+00:00","lastSuccessAt":"2026-11-07T21:04:54.606+00:00","error":null,"lastVerifiedAt":"2026-11-07T21:04:54.606+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. 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