Server-side Request Forgery (SSRF) Affecting deno package, versions <2.8.1
Threat Intelligence
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-17660660
- published27 Jun 2026
- disclosed16 Jun 2026
- creditUnknown
Introduced: 16 Jun 2026
NewCVE-2026-49860 (opens in a new tab)How to fix?
Upgrade deno to version 2.8.1 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 Server-side Request Forgery (SSRF) via the WebSocket connection process. An attacker can bypass network isolation rules and access restricted hosts by using a specially crafted domain name that passes the hostname check but resolves to a denied IP address. This is only exploitable if untrusted or third-party code is run with network restrictions enforced by --deny-net.