Most recent entries from all

EUVD-2026-368472

2026-10-03T17:31:13.969650+00:00

EUVD-2026-368472

fkie_cve-2026-86472

2026-10-03T17:31:13.969693+00:00

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.

GHSA-hrr3-gc8f-f4qj — fast-uri vulnerable to inconsistent host case normalization via percent-encoded octets

2026-10-03T17:31:13.969734+00:00

Affected: npm: fast-uri

### Impact

`fast-uri` folds the host to lowercase before it percent-decodes the host, so a percent-encoded uppercase unreserved octet such as `%41` decodes to a literal `A` that is never folded. For a scheme-relative reference (`//host`) there is no scheme, so the host canonicalization that repairs this on a scheme-bearing URL does not run. As a result `parse`, `normalize`, and `equal` disagree on the same host: `parse("//%41.com").host` returns `"A.com"` while `parse("//a.com").host` and `parse("//A.com").host` return `"a.com"`, and `equal("//%41.com", "//a.com")` is `false` even though `equal("//A.com", "//a.com")` is `true`. An application that makes a case-sensitive host decision on `fast-uri` output for a scheme-relative reference, for example a host allowlist or denylist that compares `parse(url).host` or uses `fast-uri.equal`, can be steered past the check with a percent-encoded uppercase octet. Because a hostname is case-insensitive in DNS and HTTP routing, the evading spelling reaches the same host the check meant to gate, so the effect is check evasion rather than reaching a different registrable host.

### Patches

Upgrade to `fast-uri` 4.1.5, 3.1.8, or 2.4.7.

### Workarounds

Compare hosts case-insensitively (lowercase the parsed host before any allowlist or denylist decision), or avoid making case-sensitive host decisions on scheme-relative input until upgrading.

RHSA-2026:68143 — Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

2026-10-03T17:31:13.969777+00:00

grafana: Grafana: Arbitrary code execution and information disclosure via Cross-Site Scripting in geomap panel grafana: tempo: loki: Tempo and Loki Datasource Plugins: Information disclosure and unauthorized actions via path traversal fast-uri: fast-uri: Security bypass due to inconsistent host case normalization