GHSA-XQXC-X6P3-W683

Vulnerability from github – Published: 2025-06-04 21:13 – Updated: 2025-07-02 18:29
VLAI?
Summary
Deno run with --allow-read and --deny-read flags results in allowed
Details

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.

Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.5 (Medium)
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
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "deno"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.41.3"
            },
            {
              "fixed": "2.1.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "deno"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.2.0"
            },
            {
              "fixed": "2.2.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "deno"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.3.0"
            },
            {
              "fixed": "2.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "deno_runtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.150.0"
            },
            {
              "fixed": "0.212.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-48888"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-06-04T21:13:44Z",
    "nvd_published_at": "2025-06-04T20:15:23Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\n`deno run --allow-read --deny-read main.ts` results in allowed, even though \u0027deny\u0027 should be stronger. Same with all global unary permissions given as `--allow-* --deny-*`.\n\n### Details\n\nCaused by the fast exit logic in #22894.\n\n### PoC\n\nRun the above command expecting no permissions to be passed.\n\n### Impact\n\nThis only affects a nonsensical combination of flags, so there shouldn\u0027t be a real impact on the userbase.",
  "id": "GHSA-xqxc-x6p3-w683",
  "modified": "2025-07-02T18:29:57Z",
  "published": "2025-06-04T21:13:44Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/security/advisories/GHSA-xqxc-x6p3-w683"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-48888"
    },
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/pull/22894"
    },
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/pull/29213"
    },
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/commit/2f0fae9d9071dcaf0a689bc7097584b1b9ebc8db"
    },
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/commit/9d665572d3cd39f997e29e6daac7c1102fc5c04f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/commit/ef315b56c26c9ef5f25284a5100d2ed525a148cf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/denoland/deno"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Deno run with --allow-read and --deny-read flags results in allowed"
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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