PT-2025-23840 · Deno · Deno

Nayeemrmn · Published 2025-06-04 · Updated 2026-04-14 · CVE-2025-48888

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Deno versions 1.41.3 through 2.1.12 Deno versions 1.41.3 through 2.2.12 Deno versions 1.41.3 through 2.3.1

Description The issue affects Deno, a JavaScript, TypeScript, and WebAssembly runtime, where the --deny-* flag is not prioritized over the --allow-* flag. This results in allowed access even when 'deny' should be stronger. The issue only affects a specific combination of flags and is not expected to have a significant impact on users.

Recommendations For Deno versions 1.41.3 through 2.1.12, upgrade to version 2.1.13 to receive a patch. For Deno versions 1.41.3 through 2.2.12, upgrade to version 2.2.13 to receive a patch. For Deno versions 1.41.3 through 2.3.1, upgrade to version 2.3.2 to receive a patch.

Exploit

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2025-48888

GHSA-XQXC-X6P3-W683

JLSEC-2026-109

Affected Products

Deno

References · 16

• 🔥 https://github.com/denoland/deno/security/advisories/GHSA-xqxc-x6p3-w683 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48888.json · Exploit
• https://github.com/denoland/deno/commit/2f0fae9d9071dcaf0a689bc7097584b1b9ebc8db · Patch
• https://github.com/denoland/deno/commit/ef315b56c26c9ef5f25284a5100d2ed525a148cf · Patch
• https://github.com/denoland/deno/commit/9d665572d3cd39f997e29e6daac7c1102fc5c04f · Patch
• https://github.com/denoland/deno/pull/29213 · Patch
• https://github.com/denoland/deno/pull/22894 · Patch
• https://osv.dev/vulnerability/GHSA-xqxc-x6p3-w683 · Vendor Advisory
• https://osv.dev/vulnerability/JLSEC-2026-109 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-48888 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-48888 · Security Note
• https://github.com/denoland/deno · Note
• https://twitter.com/VulmonFeeds/status/1930418310778106312 · Twitter Post
• https://twitter.com/CVEnew/status/1930347889751965973 · Twitter Post
• https://t.me/cvetracker/25439 · Telegram Post