intlify vue-i18n up to 9.14.2/10.0.5/11.1.1 handleFlatJson prototype pollution

Summaryinfo

A vulnerability categorized as critical has been discovered in intlify vue-i18n up to 9.14.2/10.0.5/11.1.1. This impacts the function handleFlatJson. Executing a manipulation can lead to prototype pollution. This vulnerability appears as CVE-2025-27597. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in intlify vue-i18n up to 9.14.2/10.0.5/11.1.1. It has been declared as critical. This vulnerability affects the function handleFlatJson. The manipulation with an unknown input leads to a prototype pollution vulnerability. The CWE definition for the vulnerability is CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Vue I18n is the internationalization plugin for Vue.js. @intlify/message-resolver and @intlify/vue-i18n-core are vulnerable to Prototype Pollution through the entry function: handleFlatJson. An attacker can supply a payload with Object.prototype setter to introduce or modify properties within the global prototype chain, causing denial of service (DoS) a the minimum consequence. Moreover, the consequences of this vulnerability can escalate to other injection-based attacks, depending on how the library integrates within the application. For instance, if the polluted property propagates to sensitive Node.js APIs (e.g., exec, eval), it could enable an attacker to execute arbitrary commands within the application's context.

The advisory is available at github.com. This vulnerability was named CVE-2025-27597 since 03/03/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 9.14.3, 10.0.6 or 11.1.2 eliminates this vulnerability. Applying the patch 4bb6eacda7fc2cde5687549afa0efb27ca40862a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• intlify

Name

• vue-i18n

Version

• 9.14.0
• 9.14.1
• 9.14.2
• 10.0.0
• 10.0.1
• 10.0.2
• 10.0.3
• 10.0.4
• 10.0.5
• 11.1.0
• 11.1.1

License

• open-source

Website

• Product: https://github.com/intlify/vue-i18n/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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