Vue I18n Prototype Pollution in `handleFlatJson`
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-27597
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 08:25 UTC · Revision 1
Source evidence
Vue I18n Prototype Pollution in `handleFlatJson`
core-osv · Original sourcePublished 7 Mar 2025, 15:51 UTC
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.
osv:CVE-2025-27597
Complete source record
{
"id": "d4ac976a144a52c6bdaa7428f80a473d1a9cd8c6c91ead7e5842e4080463f069",
"url": "https://osv.dev/vulnerability/CVE-2025-27597",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Vue I18n Prototype Pollution in `handleFlatJson`",
"summary": "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.",
"evidence": "osv:CVE-2025-27597",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2025-27597",
"aliases": [
"CVE-2025-27597",
"GHSA-p2ph-7g93-hw3m"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P"
}
],
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],
"modified": "2026-10-28T02:30:27.464565298Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27597.json",
"https://github.com/intlify/vue-i18n/security/advisories/GHSA-p2ph-7g93-hw3m",
"https://nvd.nist.gov/vuln/detail/CVE-2025-27597",
"https://github.com/intlify/vue-i18n/commit/4bb6eacda7fc2cde5687549afa0efb27ca40862a"
],
"provider_metadata": {
"cwe_ids": [
"CWE-1321"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27597.json"
}
},
"related_cves": [
{
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"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 493796,
"published_at": "2025-03-07T15:51:39.753+00:00"
}