Deno run with --allow-read and --deny-read flags results in allowed
### Summary `deno run --allow-read --deny-read main.ts` results in allowed, even though 'deny' should be stronger. Same with all global unary permissions given as `--allow-* --deny-*`. ### Details Caused by the fast exit logic in #22894. ### PoC Run the above command expecting no permissions to be passed. ### Impact This only affects a nonsensical combination of flags, so there shouldn't be a real impact on the userbase.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-48888US | medium5.3OT elevated | — | ||
Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 1.41.3 and prior to versions 2.1.13, 2.2.13, and 2.3.2, `deno run --allow-read --deny-read main.ts` r… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/denoland/denoPACKAGE
- https://github.com/denoland/deno/commit/2f0fae9d9071dcaf0a689bc7097584b1b9ebc8dbWEB
- https://github.com/denoland/deno/commit/9d665572d3cd39f997e29e6daac7c1102fc5c04fWEB
- https://github.com/denoland/deno/commit/ef315b56c26c9ef5f25284a5100d2ed525a148cfWEB
- https://github.com/denoland/deno/pull/22894WEB
- https://github.com/denoland/deno/pull/29213WEB
- https://github.com/denoland/deno/security/advisories/GHSA-xqxc-x6p3-w683WEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-48888ADVISORY
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