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CVE-2025-48888

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

Published: Jun 4, 2025Updated: Jul 2, 2025 Sources: CVE List NVD GHSACWE-863
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.3%
Top 74.2%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-863

Affected Products

denodeno
Library
OSS Libraries / generic-library
denodenoland
On-prem
OSS Libraries / generic-library
denocrates.ioOSS Libraries
deno_runtimecrates.ioOSS Libraries
denooss-projectOSS Librariesaka deno runtime, deno standard modules
denolandoss-projectUSOSS Librariesaka deno
crates.iopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/denoland/deno/commit/2f0fae9d9071dcaf0a689bc7097584b1b9ebc8db
github.com
https://github.com/denoland/deno/commit/9d665572d3cd39f997e29e6daac7c1102fc5c04f
github.com
https://github.com/denoland/deno/commit/ef315b56c26c9ef5f25284a5100d2ed525a148cf
github.com
and 5 more references View all →

Timeline

Published
Jun 4, 2025
Last Updated
Jul 2, 2025

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