Indicator investigation
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Indicator
Type cve · source NVD CVE
HIGH SEVERITY (CVSS 7.5)
Vulnerability investigation
The available snapshot does not list this vulnerability in CISA KEV; that is not proof exploitation has not occurred. NVD rates the technical severity high at CVSS 7.5. These are public vulnerability signals, not proof that a specific environment runs an affected version.
Exploitation status
No KEV listing in available snapshot
Absence from KEV does not establish absence of exploitation.
30-day exploitation likelihood
Unavailable
FIRST EPSS did not return a score.
Technical severity
7.5 · high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected surface
1 parsed product
Openjsf Fast-Uri
Weakness class
CWE-436, CWE-551
CWE describes the weakness category, not whether a deployed product is reachable or exploitable.
Corpus evidence
2 connectors · 33 citations
No related report text is available in the local corpus.
Findings stay bounded to named sources and observable infrastructure.
fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode (IDN) hostnames for HTTP-family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor, silently leaving the host in its original Unicode form while normalize() and equal() still return values that differ from a WHATWG-compatible URL parser. Applications that use fast-uri to enforce host-based policy (denylists, loopback filtering, redirect validation, outbound proxy routing) before passing the same URL to Node's URL or fetch can be bypassed when the two implementations resolve the same input to different hosts. Patches: upgrade to fast-uri 3.1.3 for the 3.x line or 4.0.1 for the 4.x line. Workarounds: enforce host policy using the same URL parser used for the actual request, or reject non-ASCII hosts before policy checks.
The base CVE appears first. Independent evidence is added without blocking the page.
Investigation status
Checking for newly completed evidence
NIST NVD
NVD evidence is available in this response
CISA KEV
Known-exploitation catalog check is pending
FIRST EPSS
Forensia does not request or publish EPSS while source rights are under review
Reports
Report links are still being resolved
Relationships
Product and vulnerability relationships are still being prepared
Local EPSS row, KEV flag, and catalog notes from stored metadata only.
Vendor/product strings parsed from local CPE URIs (no inferred ATT&CK).
| Product | CPE (truncated) |
|---|---|
| Openjsf Fast-Uri | cpe:2.3:a:openjsf:fast-uri:*:*:*:*:*:node.js:*:* |
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