CVE-2025-27597 Vue I18n Prototype Pollution in `handleFlatJson`
Attackers can exploit prototype pollution in Vue I18n to cause denial of service or potentially execute arbitrary code via sensitive Node.js APIs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-27597?
CVE-2025-27597 is a high-severity code injection vulnerability in intlify vue-i18n, published on 7 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-1321
Which versions are affected by CVE-2025-27597?
22 open source packages ship an affected version, including @intlify/vue-i18n-core, @intlify/core and @intlify/core-base.
| Package | Affected | Fixed in |
|---|---|---|
@intlify/vue-i18n-core npm | From 10.0.0-alpha.1 | 10.0.6 |
@intlify/vue-i18n-core npm | From 10.0.0-alpha.1 | 10.0.6 |
@intlify/vue-i18n-core npm | From 11.0.0-beta.0 | 11.1.2 |
@intlify/vue-i18n-core npm | From 11.0.0-beta.0 | 11.1.2 |
@intlify/vue-i18n-core npm | From 9.2.0 | 9.14.3 |
@intlify/vue-i18n-core npm | From 9.2.0 | 9.14.3 |
16 more packages
@intlify/core npm | From 9.1.0 | 9.1.11 |
@intlify/core npm | From 9.1.0 | 9.1.11 |
@intlify/core-base npm | From 9.1.0 | 9.1.11 |
@intlify/core-base npm | From 9.1.0 | 9.1.11 |
@intlify/message-resolver npm | From 9.1.0 | 9.1.11 |
@intlify/message-resolver npm | From 9.1.0 | 9.1.11 |
petite-vue-i18n npm | From 10.0.0 | 10.0.6 |
petite-vue-i18n npm | From 10.0.0 | 10.0.6 |
petite-vue-i18n npm | From 11.0.0-beta.0 | 11.1.2 |
petite-vue-i18n npm | From 11.0.0-beta.0 | 11.1.2 |
vue-i18n npm | From 10.0.0-alpha.1 | 10.0.6 |
vue-i18n npm | From 10.0.0-alpha.1 | 10.0.6 |
vue-i18n npm | From 11.0.0-beta.0 | 11.1.2 |
vue-i18n npm | From 11.0.0-beta.0 | 11.1.2 |
vue-i18n npm | From 9.1.0 | 9.14.3 |
vue-i18n npm | From 9.1.0 | 9.14.3 |
How do I fix CVE-2025-27597?
Upgrade @intlify/vue-i18n-core to a fixed version for your release line: 10.0.6, 11.1.2 or 9.14.3.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-27597 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-27597 exists.
Sources
Also known as GHSA-p2ph-7g93-hw3m.