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    CVE-2026-22863

    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.

    Published:Jan 15, 2026
    Last Modified:Apr 18, 2026
    EPS:Jan 15, 2026
    EPSS Score:0.00009
    CVSS Score:7.5

    Affected Products

    Vendor
    Deno
    Product
    Deno

    Exploits

    https://github.com/denoland/deno/security/advisories/GHSA-5379-f5hf-w38v

    Common Weakness Enumeration

    CWE-325 Missing Cryptographic Step

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-68 Subvert Code-signing Facilities

    Related CVEs

    CVE-2026-55517 (CVSS 4.3) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.5, a Deno program that opens a client …
    CVE-2026-44726 (CVSS 7.4) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. From 2.0.0 until 2.7.8, a flaw in Deno's Node.js tl…
    CVE-2026-49401 (CVSS 7.3) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.14, Deno's permission system enforces …
    CVE-2026-49402 (CVSS 8.1) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.10, Deno's node:child_process implemen…
    CVE-2026-49406 (CVSS 5.5) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.12, when Deno was run in BYONM mode (n…
    CVE-2026-49411 (CVSS 6.5) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.0, the Node.js compatibility TCP path …
    CVE-2026-49983 (CVSS 5.2) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.1, environment access is gated by the …
    CVE-2026-49860 (CVSS 5.2) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.1, when a WebSocket connection was ope…
    CVE-2026-49859 (CVSS 5.2) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.1, when fetch() was called, Deno check…
    CVE-2026-49440 (CVSS 7.4) — Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.1, node:crypto.checkPrime(candidate[, …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High