What’s Vulnerable › Vulnerabilities

CVE-2024-27932: Deno's improper suffix match testing for DENO_AUTH_TOKENS

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-03-21 · updated 2026-06-17
• Weakness: CWE-20

Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 1.8.0 and prior to version 1.40.4, Deno improperly checks that an import specifier's hostname is equal to or a child of a token's hostname, which can cause tokens to be sent to servers they shouldn't be sent to. An auth token intended for `example[.]com` may be sent to `notexample[.]com`. Anyone who uses DENO_AUTH_TOKENS and imports potentially untrusted code is affected. Version 1.40.0 contains a patch for this issue

Affected products

• denoland deno: from 1.8.0 before 1.40.4 — fixed in 1.40.4

How to fix

Upgrade to a fixed version: denoland deno 1.40.4. Check the vendor advisory for mitigations.

References

• https://github.com/denoland/deno/blob/3f4639c330a31741b0efda2f93ebbb833f4f95bc/cli/auth_tokens.rs#L89
• https://github.com/denoland/deno/commit/de23e3b60b066481cc390f459497d5bef42a899b
• https://github.com/denoland/deno/security/advisories/GHSA-5frw-4rwq-xhcr
• https://github.com/denoland/deno/blob/3f4639c330a31741b0efda2f93ebbb833f4f95bc/cli/auth_tokens.rs#L89
• https://github.com/denoland/deno/commit/de23e3b60b066481cc390f459497d5bef42a899b
• https://github.com/denoland/deno/security/advisories/GHSA-5frw-4rwq-xhcr

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