CVE-2026-118257

HIGH 7.2

Vue I18n: escapeParameter does not prevent XSS through srcdoc in translation messages

CVSS Score

7.2

EPSS Score

0.0%

EPSS Percentile

0th

Vue I18n is the internationalization plugin for Vue.js. From 11.1.10 until 11.4.14 and from 12.0.0-alpha.4 until 12.0.0-alpha.5, sanitizeTranslatedHtml() escapes markup and event-handler text inside an iframe srcdoc value but leaves the srcdoc attribute active. Browsers decode the character references and parse the value as a same-origin nested HTML document, allowing attacker-controlled parameters or translation content placed in srcdoc to execute script when applications enable escapeParameter and render translations as HTML through v-html. Versions 9.14.5 and 10.0.8 are also affected and are no longer supported, while i18n-t rendering is not affected. This issue is fixed in versions 11.4.14 and 12.0.0-alpha.5.

CWE	CWE-79 CWE-116
Vendor	intlify
Product	vue-i18n
Published	Oct 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

intlify / vue-i18n

= 9.14.5 = 10.0.8 >= 11.1.10, < 11.4.14 >= 12.0.0-alpha.4, < 12.0.0-alpha.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/intlify/vue-i18n/security/advisories/GHSA-83rm-6c8r-g728 github.com: https://github.com/intlify/vue-i18n/pull/2679 github.com: https://github.com/intlify/vue-i18n/commit/43391d20e7c85403cb59bdb21b5d542819f54042 github.com: https://github.com/intlify/vue-i18n/releases/tag/v11.4.14 github.com: https://github.com/intlify/vue-i18n/releases/tag/v12.0.0-alpha.5