Is CVE-2026-71315 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-71315 being exploited in the wild.

How severe is CVE-2026-71315?

High severity, with a CVSS score of 8.2, published 5 August 2026.

Which products and versions are affected?

nuxt (npm) SEMVER:introduced=4.4.7,fixed=4.5.1.

Is there a fix for CVE-2026-71315?

Yes. nuxt (npm): upgrade to 4.5.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-71315 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-71315?

Check whether you run nuxt (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-71315: Nuxt authorization bypass via mixed-case route rules

CVE-2026-71315 · Severity: high · CVSS 8.2 · Published 2026-08-05

Nuxt is a popular web framework used to build high-performance websites and applications. A security flaw was discovered where certain protection rules (such as login requirements) are ignored if a user accesses a web address using a mix of uppercase and lowercase letters. This could allow an unauthorized person to view private data or access restricted administrative pages simply by changing the capitalization of the URL.

Technologies: nuxt (npm). Vendors: npm.

Quick answers

Is CVE-2026-71315 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-71315 being exploited in the wild.
How severe is CVE-2026-71315?: High severity, with a CVSS score of 8.2, published 5 August 2026.
Which products and versions are affected?: nuxt (npm) SEMVER:introduced=4.4.7,fixed=4.5.1.
Is there a fix for CVE-2026-71315?: Yes. nuxt (npm): upgrade to 4.5.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-71315 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-71315?: Check whether you run nuxt (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

nuxt (npm): upgrade to 4.5.1 or later
```
npm install nuxt@4.5.1
```

Technical details

Nuxt matches route rules case-insensitively by default, but an incomplete fix for a previous vulnerability (CVE-2026-53721) resulted in an asymmetric matching process. While the lookup path is folded to lowercase, the route-rule keys compiled into the matcher remain verbatim (mixed-case). Consequently, rules defined with uppercase characters (e.g., /Admin) or derived from PascalCase page files fail to match. This allows attackers to bypass 'appMiddleware' auth gates and other route-level protections by requesting paths that vue-router serves case-insensitively but Nuxt fails to protect. The issue is resolved in versions 4.5.1 and 3.21.10 by ensuring both keys and lookups are normalized symmetrically.

Affected products

Nuxt nuxt >= 4.4.7, < 4.5.1
Nuxt nuxt >= 3.21.7, < 3.21.10

Identifiers

CVE-2026-71315
GHSA-hxvh-4h3w-prp9

Timeline

2026-07-27: disclosed
2026-08-05: advisory
2026-08-05: patched

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.