---
title: "CVE-2026-118257: Vue I18n - Stored XSS"
description: "Vue I18n 9.14.5, 10.0.8, 11.1.10 to < 11.4.14, and 12.0.0-alpha.4 to < 12.0.0-alpha.5 contain a stored XSS caused by improper sanitization of iframe srcdoc attribute in sanitizeTranslatedHtml(), letting attackers execute scripts via attacker-controlled translation content, exploit requires rendering translations as HTML with escapeParameter enabled."
url: https://panop.io/threat-heartbeat/CVE-2026-118257/
---

# CVE-2026-118257 Vue I18n - Stored XSS

Vue I18n 9.14.5, 10.0.8, 11.1.10 to < 11.4.14, and 12.0.0-alpha.4 to < 12.0.0-alpha.5 contain a stored XSS caused by improper sanitization of iframe srcdoc attribute in sanitizeTranslatedHtml(), letting attackers execute scripts via attacker-controlled translation content, exploit requires rendering translations as HTML with escapeParameter enabled.

CVSS base score 7.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-118257)

## Details

Type

Stored XSS

Impact

Client Script Exec

CVSS vector

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

Published

28 October 2026

Updated

29 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to versions 11.4.14 or 12.0.0-alpha.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-118257](https://nvd.nist.gov/vuln/detail/CVE-2026-118257)
- [https://github.com/intlify/vue-i18n/releases/tag/v12.0.0-alpha.5](https://github.com/intlify/vue-i18n/releases/tag/v12.0.0-alpha.5)
- [https://github.com/intlify/vue-i18n/security/advisories/GHSA-83rm-6c8r-g728](https://github.com/intlify/vue-i18n/security/advisories/GHSA-83rm-6c8r-g728)
- [https://github.com/intlify/vue-i18n/commit/43391d20e7c85403cb59bdb21b5d542819f54042](https://github.com/intlify/vue-i18n/commit/43391d20e7c85403cb59bdb21b5d542819f54042)
- [https://github.com/intlify/vue-i18n/pull/2679](https://github.com/intlify/vue-i18n/pull/2679)
- [https://github.com/intlify/vue-i18n/releases/tag/v11.4.14](https://github.com/intlify/vue-i18n/releases/tag/v11.4.14)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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