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deno

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Before 2.6.0, node:crypto doesn't finalize cipher. The vulnerability allows an attacker to have infinite encryptions. This can lead to naive attempts at brute forcing, as well as more refined attacks with the goal to learn the server secrets. This vulnerability is fixed in 2.6.0.

CVE-2026-22863 is a critical cryptographic vulnerability identified in the Deno runtime environment, specifically affecting versions prior to 2.6.0. Deno, a modern runtime for JavaScript, TypeScript, and WebAssembly, includes a node:crypto module for cryptographic operations. The vulnerability arises from a missing cryptographic step: the cipher is not properly finalized during encryption processes. Proper finalization is essential to ensure the integrity and security of cryptographic outputs. Without this step, attackers can perform unlimited encryption operations without the expected cryptographic protections, effectively bypassing safeguards that limit brute force or cryptanalysis attempts. This flaw enables attackers to attempt infinite encryptions, facilitating both naive brute force attacks and more sophisticated cryptanalytic methods aimed at revealing server-side secrets such as encryption keys or sensitive data. The vulnerability is exploitable remotely without requiring any authentication or user interaction, increasing its risk profile. Although no known exploits have been reported in the wild yet, the high CVSS score (9.2) reflects the severe potential impact. The issue was addressed and fixed in Deno version 2.6.0, which properly finalizes cipher operations to restore cryptographic integrity. Organizations using vulnerable Deno versions, especially in security-critical applications, face significant risks of data compromise or unauthorized access due to this flaw.

Detailed information about CVE-2026-22863: CWE-325: Missing Cryptographic Step in denoland deno affecting denoland deno. Get real-time updates, technical detail

CVE-2026-22863: CWE-325: Missing Cryptographic Step in denoland deno - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-22863: CWE-325: Missing Cryptographic Step in denoland deno

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