Vulnerability in Deno Runtime Affecting File Execution
CVE-2026-22864

8.1HIGH

Key Information:

Vendor

Denoland

Status
Deno
Vendor
CVE Published:
15 January 2026

What is CVE-2026-22864?

Deno, a runtime for JavaScript, TypeScript, and WebAssembly, contains a vulnerability that allows for improper validation of file extensions when spawning processes. Prior to version 2.5.6, the implementation utilized a case-sensitive check against specific file extensions such as .bat and .cmd. This check could be bypassed by using alternate casing (like .BAT or .Bat), potentially enabling the execution of unauthorized batch scripts and compromising system security. The vulnerability has been addressed in version 2.5.6, which reinforces checks to better secure the execution environment.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

deno < 2.5.6

References

https://github.com/denoland/deno/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/denoland/deno/releases/tag/v2.5.6
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
.