CVE-2026-18446
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
fast-uri vulnerable to host confusion via backslash authority introducer
fast-uri before 4.1.2, 3.1.5, and 2.4.4 requires a literal double forward slash to recognize a URI authority, so a reference that uses a backslash based introducer in place of it (backslash backslash, forward slash backslash, or backslash forward slash) is parsed with no authority and folds into the path. Node's native WHATWG URL parser instead treats a backslash as interchangeable with a forward slash for special schemes, so the two parsers extract different hosts from the same input. Applications that use fast-uri to enforce host based policy such as allowlists, SSRF filtering, or redirect validation before passing the same URL into Node's URL or fetch consumers can be steered to an unintended host. Upgrade to fast-uri 4.1.2, 3.1.5, or 2.4.4.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
fast-uri
- Vendor
- fast-uri
- Product
- fast-uri
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.0.0 | affected | semver | 4.1.2 | Unavailable | None listed |
| 4.1.2 | unaffected | semver | Unavailable | Unavailable | None listed |
| 3.0.0 | affected | semver | 3.1.5 | Unavailable | None listed |
| 3.1.5 | unaffected | semver | Unavailable | Unavailable | None listed |
| 0 | affected | semver | 2.4.4 | Unavailable | None listed |
| 2.4.4 | unaffected | semver | Unavailable | Unavailable | None listed |