CVE-2025-27597: high-severity vulnerability in intlify vue-i18n
Vue I18n Prototype Pollution in `handleFlatJson`
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.9epss 0.6%
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.
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
Affected products
intlify · vue-i18nRelated CVEs — intlify vue-i18n
In the same product, most dangerous first.
CVE-2025-53892MEDIUMIntlify Vue I18n's escapeParameterHtml does not prevent DOM-based XSS via tag attributes like onerrorEPSS 0.8%CVE-2024-52810MEDIUMPrototype Pollution in @intlify/shared >=9.7.0 <= 10.0.4EPSS 0.8%CVE-2024-52809MEDIUMCross-site Scripting vulnerability with prototype pollution in vue-i18nEPSS 0.7%CVE-2026-118256LOWVue I18n: `escapeParameter` does not escape named values when the same call also passes a listEPSS 0.5%CVE-2026-118257HIGHVue I18n: escapeParameter does not prevent XSS through srcdoc in translation messagesEPSS 0.3%