How severe is CVE-2024-52809?

No CVSS score has been assigned to CVE-2024-52809 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2024-52809?

CVE-2024-52809 affects the following packages: @intlify/core-base (npm), vue-i18n (npm), @intlify/core (npm), @intlify/vue-i18n-core (npm), petite-vue-i18n (npm), @intlify/core-base (npm), vue-i18n (npm), @intlify/core (npm), and 1 more. Ecosystems affected: npm.

How do I fix CVE-2024-52809?

Update @intlify/core-base to 9.14.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-52809 is resolved across your whole dependency graph.

How do I detect CVE-2024-52809 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @intlify/core-base. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate CVE-2024-52809 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2024-52809?

O3 pinpoints whether CVE-2024-52809 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is CVE-2024-52809 actively exploited in the wild?

No public exploit code has been indexed for CVE-2024-52809 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2024-52809?

CVE-2024-52809 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 46th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2024-52809?

CVE-2024-52809 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2024-52809 published, and has it been updated?

CVE-2024-52809 was published on November 29, 2024 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

CVE-2024-52809

Cross-site Scripting vulnerability with prototype pollution in vue-i18n

Also known asGHSA-9r9m-ffp6-9x4v

Published

Nov 29, 2024

Updated

Apr 10, 2026

Affected

9 pkgs

Patched

9 / 9

Exploits

None indexed

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk46th percentile+0.51%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

9 pkgs affected

Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.

@intlify/core-basenpm

3.1Mdownloads / week

vue-i18nnpm

3.3Mdownloads / week

@intlify/corenpm

554Kdownloads / week

Description

vue-i18n is an internationalization plugin for Vue.js. In affected versions vue-i18n can be passed locale messages to createI18n or useI18n. When locale message ASTs are generated in development mode there is a possibility of Cross-site Scripting attack. This issue has been addressed in versions 9.14.2, and 10.0.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected Packages

9 total 9 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`@intlify/core-base`	≥ 9.3.0&&< 9.14.2	9.14.2
📦npm	`vue-i18n`	≥ 9.3.0&&< 9.14.2	9.14.2
📦npm	`@intlify/core`	≥ 9.3.0&&< 9.14.2	9.14.2
📦npm	`@intlify/vue-i18n-core`	≥ 9.3.0&&< 9.14.2	9.14.2
📦npm	`petite-vue-i18n`	≥ 10.0.0&&< 10.0.5	10.0.5
📦npm	`@intlify/core-base`	≥ 10.0.0&&< 10.0.5	10.0.5

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @intlify/core-base. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update @intlify/core-base to 9.14.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-52809 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2024-52809 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2024-52809. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

vue-i18n is an internationalization plugin for Vue.js. In affected versions vue-i18n can be passed locale messages to `createI18n` or `useI18n`. When locale message ASTs are generated in development mode there is a possibility of Cross-site Scripting attack. This issue has been addressed in versions 9.14.2, and 10.0.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

O3 Security · Impact-Aware SCA

Is CVE-2024-52809 in your dependencies?

O3 detects CVE-2024-52809 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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