CVE-2026-40299

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Source
https://cve.org/CVERecord?id=CVE-2026-40299
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40299.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40299
Aliases
Published
2026-04-17T20:49:05.642Z
Modified
2026-07-15T01:49:14.611595882Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
next-intl has an open redirect vulnerability
Details

next-intl provides internationalization for Next.js. Applications using the next-intl middleware prior to version 4.9.1with localePrefix: 'as-needed' could construct URLs where path handling and the WHATWG URL parser resolved a relative redirect target to another host (e.g. scheme-relative // or control characters stripped by the URL parser), so the middleware could redirect the browser off-site while the user still started from a trusted app URL. The problem has been patchedin next-intl@4.9.1.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40299.json",
    "cwe_ids": [
        "CWE-601"
    ]
}
References

Affected packages

Git / github.com/amannn/next-intl

Affected ranges

Type
GIT
Repo
https://github.com/amannn/next-intl
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1c80b668aa6d853f470319eec10a3f61e78a70e6
Fixed
b4aa5380c50ad59a80d1dfdbc229590a4e0133a3
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.9.1"
        }
    ]
}

Affected versions

v0.*
v0.0.3
v0.0.4
v0.0.5
v0.1.0
v1.*
v1.3.10
v1.3.11
v1.3.2
v1.3.6
v1.3.7
v1.3.8
v1.4.0
v1.4.1
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.5.0
v1.5.1
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.0.3
v2.0.4
v2.0.5
v2.1.0
v2.1.1
v2.10.0
v2.10.1
v2.10.2
v2.10.3
v2.10.4
v2.11.0
v2.12.0
v2.13.0
v2.13.1
v2.13.2
v2.13.3
v2.13.4
v2.14.0
v2.14.1
v2.14.2
v2.14.3
v2.14.4
v2.14.5
v2.14.6
v2.15.0
v2.15.1
v2.16.0
v2.17.0
v2.17.1
v2.17.2
v2.17.3
v2.17.4
v2.17.5
v2.18.0
v2.19.0
v2.19.1
v2.19.2
v2.19.3
v2.19.4
v2.2.0
v2.2.1
v2.20.0
v2.20.1
v2.20.2
v2.21.0
v2.22.0
v2.22.1
v2.3.0
v2.3.1
v2.3.2
v2.3.3
v2.3.4
v2.3.5
v2.6.0
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.7.4
v2.7.5
v2.7.6
v2.8.0
v2.9.0
v2.9.1
v2.9.2
v3.*
v3.0.1
v3.0.2
v3.0.3
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.10.0
v3.11.0
v3.11.1
v3.11.2
v3.11.3
v3.12.0
v3.12.1
v3.12.2
v3.13.0
v3.14.0
v3.14.1
v3.15.0
v3.15.1
v3.15.1-canary.0
v3.15.1-canary.1
v3.15.2
v3.15.3
v3.15.4
v3.15.5
v3.16.0
v3.16.0-canary.0
v3.16.0-canary.1
v3.16.0-canary.2
v3.16.0-canary.3
v3.16.0-canary.4
v3.17.0
v3.17.1
v3.17.2
v3.17.3
v3.17.4
v3.17.5
v3.17.6
v3.18.0
v3.18.1
v3.19.0
v3.19.1
v3.19.2
v3.19.3
v3.19.4
v3.19.5
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.2.5
v3.20.0
v3.21.0
v3.21.1
v3.22.0
v3.23.0
v3.23.1
v3.23.2
v3.23.3
v3.23.4
v3.23.5
v3.24.0
v3.25.0
v3.25.1
v3.25.2
v3.25.3
v3.26.0
v3.26.1
v3.26.2
v3.26.3
v3.26.4
v3.26.5
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.4.0
v3.4.1
v3.4.2
v3.4.3
v3.4.4
v3.4.5
v3.5.0
v3.5.1
v3.5.2
v3.5.3
v3.5.4
v3.6.0
v3.7.0
v3.8.0
v3.9.0
v3.9.1
v3.9.2
v3.9.3
v3.9.4
v3.9.5
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.1.0
v4.2.0
v4.3.0
v4.3.1
v4.3.10
v4.3.11
v4.3.12
v4.3.2
v4.3.3
v4.3.4
v4.3.5
v4.3.6
v4.3.7
v4.3.8
v4.3.9
v4.4.0
v4.5.0
v4.5.1
v4.5.2
v4.5.3
v4.5.4
v4.5.5
v4.5.6
v4.5.7
v4.5.8
v4.6.0
v4.6.1
v4.7.0
v4.8.0
v4.8.1
v4.8.2
v4.8.3
v4.8.4
v4.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40299.json"