Vulnerability · Published Oct 28, 2026 · Assigned by GitHub_M

CVE-2026-118256Vue I18n: `escapeParameter` does not escape named values when the same call also passes a list

Low 2.1

In plain English

A low-severity cross-site scripting in vue-i18n from intlify. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)2.1Low

Exploit odds (30 days)0.5%top 58.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Vue I18n is the internationalization plugin for Vue.js. From 9.0.0-beta.5 until 11.4.14 and 12.0.0-alpha.5, enabling escapeParameter, called escapeParameterHtml in the Legacy API, does not escape named interpolation values when the same translation call supplies both list and named values because escapeParams() processes only the list branch. Applications that render translations as HTML and pass untrusted named values with a list can insert attacker-controlled markup, including phishing links, forms, and layout changes, and can permit script execution when combined with the srcdoc sanitizer bypass or on releases without the sanitizer. This issue is fixed in versions 11.4.14 and 12.0.0-alpha.5.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@intlify/core	11.4.14	GHSA-8rc2-428q-7ww3
npm	@intlify/core	12.0.0-alpha.5	GHSA-8rc2-428q-7ww3
npm	@intlify/core-base	11.4.14	GHSA-8rc2-428q-7ww3
npm	@intlify/core-base	12.0.0-alpha.5	GHSA-8rc2-428q-7ww3
npm	@intlify/vue-i18n-core	12.0.0-alpha.5	GHSA-8rc2-428q-7ww3
npm	@intlify/vue-i18n-core	11.4.14	GHSA-8rc2-428q-7ww3
npm	petite-vue-i18n	11.4.14	GHSA-8rc2-428q-7ww3
npm	petite-vue-i18n	12.0.0-alpha.5	GHSA-8rc2-428q-7ww3
npm	vue-i18n	11.4.14	GHSA-8rc2-428q-7ww3
npm	vue-i18n	12.0.0-alpha.5	GHSA-8rc2-428q-7ww3

Affected products (as reported)

Vendor	Product	Versions
intlify	vue-i18n	>= 9.0.0-beta.5, < 11.4.14>= 12.0.0-alpha.1, < 12.0.0-alpha.5

Weakness: CWE-79, CWE-116 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

References

https://github.com/intlify/vue-i18n/security/advisories/GHSA-8rc2-428q-7ww3 x_refsource_CONFIRM
https://github.com/intlify/vue-i18n/pull/2680 x_refsource_MISC
https://github.com/intlify/vue-i18n/commit/d657ce8f4b3b6b198a8f6e3d09e2b57a5d019fb8 x_refsource_MISC