CVE-2026-41691Network attack vector

URL request manipulation via raw path interpolation

Published May 7, 2026 · Updated May 7, 2026

URL injection in i18next-http-backend before 3.0.5 allows remote attackers to alter backend request URLs through crafted language values. The _readAny and create call sites pass lng and ns into loadPath and addPath templates through an interpolate helper that returns raw, unencoded values. Exposure requires an application to accept attacker-controlled language or namespace input; resulting requests can traverse paths, alter URL structure, reach internal resources, or read local files when a file-scheme loadPath is configured.

CVSS severity6.5
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

URL injection in i18next-http-backend before 3.0.5 allows remote attackers to alter backend request URLs through crafted language values. The _readAny and create call sites pass lng and ns into loadPath and addPath templates through an interpolate helper that returns raw, unencoded values. Exposure requires an application to accept attacker-controlled language or namespace input; resulting requests can traverse paths, alter URL structure, reach internal resources, or read local files when a file-scheme loadPath is configured.

The record

CVE
CVE-2026-41691
Published
May 7, 2026
Updated
May 7, 2026
Vendor
i18next
Product
i18next-http-backend
Classifications
CWE-74, CWE-22
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2026CVE publishedPublication date reported by the CVE source.
  2. May 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

i18next · i18next-http-backendversion=< 3.0.5

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo