Cleartext Transmission of Sensitive Information Affecting deno package, versions >=2.0.0 <2.7.8
Threat Intelligence
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The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUST-DENO-17660653
- published27 Jun 2026
- disclosed27 May 2026
- creditr3wretrhy
Introduced: 27 May 2026
CVE-2026-44726 (opens in a new tab)How to fix?
Upgrade deno to version 2.7.8 or higher.
Overview
deno is an a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.
Affected versions of this package are vulnerable to Cleartext Transmission of Sensitive Information via the TLS connection retry process. An attacker can intercept or modify sensitive application data by triggering a failed initial connection attempt and causing the application to transmit data in plaintext before the secure connection is established. This is only exploitable if the application writes to the socket before the secureConnect event while using the Node.js TLS compatibility layer with autoSelectFamily enabled.