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Fast Uri EUVDEUVD-2026-70282

| CVE-2026-84394 HIGH
Interpretation Conflict (CWE-436)
2026-09-02 openjs
7.5
CVSS 3.1 · Vendor: openjs
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Severity by source

Vendor (openjs) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (openjs).

CVSS VectorVendor: openjs

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

4
POC Analysis Generated
Sep 08, 2026 - 15:23 vuln.today
Patch available
Sep 02, 2026 - 22:17 EUVD
Analysis Generated
Sep 02, 2026 - 21:06 vuln.today
CVE Published
Sep 02, 2026 - 20:25 cve.org
HIGH 7.5

DescriptionCVE.org

fast-uri accepts a host that contains an unbalanced or misplaced authority bracket without reporting an error. A host that starts with an opening bracket but does not end with a closing bracket is neither validated as an IP literal nor canonicalized as a domain name, so parse() returns it as the host with error undefined, while Node's URL and the HTTP clients built on it resolve the same string to a different host. An application that reads the parsed host to make a host decision, such as an SSRF denylist, a redirect allowlist, or proxy routing, and then passes the original URL to an HTTP client evaluates its policy against a string that is not the host the request reaches. The same host is carried through normalize, equal, and resolve. This affects fast-uri versions 2.4.5, 3.1.6, and 4.1.3, and is fixed in 2.4.6, 3.1.7, and 4.1.4, where parse() reports a malformed host for any host that contains a bracket but is not a valid IPv6 literal.

AnalysisAI

Host-parsing ambiguity in fast-uri allows attackers to silently bypass SSRF denylists, redirect allowlists, and proxy routing rules by submitting URLs containing unbalanced authority brackets. Affected versions 2.4.5, 3.1.6, and 4.1.3 of the Fastify ecosystem URI parsing library return the malformed bracket-containing string as the host without raising an error, while Node.js's URL implementation and downstream HTTP clients resolve the same string to an entirely different host. …

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Within 24 hours, enumerate all applications using affected fast-uri versions (2.4.5, 3.1.6, 4.1.3) and classify by business criticality. …

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CVE-2026-16221 HIGH POC
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Host-based policy bypass in the fast-uri Node.js URI parser (versions 2.3.1 through 4.1.0, spanning the 2.x line up to 2

CVE-2026-86818 MEDIUM
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The mailto scheme parser added to fast-uri 4.1.3 (and still present in 4.1.4) compares query field names against the res

CVE-2026-86472 MEDIUM
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We need answer JSON only. Need produce fields. Need be careful. Let's parse. CVE-2026-86472 fast-uri. Description: fast

Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Module for SAP Applications 15 SP7 Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 Affected
SUSE Linux Enterprise Server for SAP applications 16.0 Affected
SUSE Linux Enterprise Server for SAP applications 16.1 Affected
openSUSE Leap 16.0 Affected

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EUVD-2026-70282 vulnerability details – vuln.today

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