CVE-2026-86472 Affecting pulumi-language-nodejs-fips package, versions <3.263.0-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.25% (15th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-PULUMILANGUAGENODEJSFIPS-20343796
  • published1 Oct 2026
  • disclosed15 Sept 2026

Introduced: 15 Sep 2026

NewCVE-2026-86472  (opens in a new tab)

How to fix?

Upgrade Minimos:latest pulumi-language-nodejs-fips to version 3.263.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pulumi-language-nodejs-fips package and not the pulumi-language-nodejs-fips package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv. In versions before 2.4.7, from 3.0.0 through 3.1.7, and from 4.0.0 through 4.1.4, fast-uri folds the host to lowercase before it percent-decodes the host, so a percent-encoded uppercase octet such as %41 decodes to a literal A that is never folded. For a scheme-relative reference such as //host there is no scheme, so the host canonicalization that would normally repair this does not run, and parse, normalize, and equal then disagree on the same host. An application that makes a case-sensitive host decision on fast-uri output, for example a host allowlist or denylist that compares the parsed host or uses equal, can be steered past the check with a percent-encoded uppercase octet, and because hostnames are case-insensitive in DNS and HTTP the evading spelling still reaches the host the check meant to gate. The issue is fixed in fast-uri 2.4.7, 3.1.8, and 4.1.5, and users should upgrade to one of those versions or later. As a workaround, compare hosts case-insensitively by lowercasing the parsed host before any allowlist or denylist decision.

CVSS Base Scores

version 3.1