High · CVSS 7.2CVE-2026-118257

Vue I18n: escapeParameter does not prevent XSS through srcdoc in translation messagesCVE-2026-118257

Answer in brief

CVE-2026-118257 records a High severity (CVSS 7.2) vulnerability in Vue I18n: escapeParameter does not prevent XSS through srcdoc in translation messages. The current sources do not mark it as known exploited. The current feed maps intlify/vue-i18n (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 28, 2026Updated Oct 28, 2026Source checked Oct 28, 2026First seen by HOL Oct 28, 2026Material review Oct 28, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.2
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps intlify/vue-i18n (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
intlify/vue-i18ngeneric	= 9.14.5 \|\| = 10.0.8 \|\| >=11.1.10 <11.4.14 \|\| >=12.0.0-alpha.4 <12.0.0-alpha.5	11.4.14, 12.0.0-alpha.5

Recommended response

Check inventory. Check lockfiles and deployed manifests for intlify/vue-i18n.
Review the reported fix. Update intlify/vue-i18n to 11.4.14 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 28, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.