CVE-2025-48888CWE-863

Deno run with --allow-read and --deny-read flags results in allowed

Medium · published June 4, 2025

CVSS v4.0
5.5
EPSS
0%
Percentile
33.7
In the wild
Unconfirmed
What it is

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` results in allowed, even though 'deny' should be stronger. The result is the same with all global unary permissions given as `--allow-* --deny-*`. This only affects a nonsensical combination of flags, so there shouldn't be a real impact on the userbase. Users may upgrade to version 2.1.13, 2.2.13, or 2.3.2 to receive a patch.

The record
Technical detail
CVSS v4.0
5.5 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
EPSS
0.00406 · 33.7th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2025-06-04T19:15Z
EPSS history
Timeline
  • 04 JUN 19:15Z
    Deno run with --allow-read and --deny-read flags results in allowed
    cvelistv5