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CVE-2026-42353

Path traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters

Published: May 8, 2026Updated: May 12, 2026 Sources: CVE List NVDCWE-22
8.2HIGH
NVD MITRE
EPSS Score
0.4%
Top 68.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware passes the user-controlled lng and ns values from getResourcesHandler directly into i18next.services.backendConnector.load(languages, namespaces, …) without any sanitization. Depending on which backend is configured, the unvalidated path segments enable either path traversal or SSRF. This issue has been patched in version 3.9.3.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-22CWE-918

Affected Products

i18next
oss-project
i18next-http-middlewareLibrary
OSS Libraries / generic-library

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

4 techniques
Collection
Command and Control
Discovery
Initial Access
View detailed technique mapping

References

https://github.com/i18next/i18next-http-middleware/security/advisories/GHSA-jfgf-83c5-2c4m
github.com

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