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Universal XSS via the HTML language attribute in Translation Services

Type: advisorySource: Official CVE List1 source record

Firefox for iOS directly interpolated the page’s HTML language attribute into translation JavaScript, allowing attacker-controlled markup to execute code in Firefox’s privileged content world and bypass the page’s Content Security Policy. This vulnerability was fixed in Firefox for iOS 157.1.

Announced Group revision 1
Original source ↗

CVE-2026-103418

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-103418

Firefox for iOS

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Mozilla",
    "product": "Firefox for iOS",
    "versions": [
      {
        "status": "unaffected",
        "version": "157.1",
        "versionType": "rpm",
        "lessThanOrEqual": "*"
      }
    ]
  }
]
Related CVEs
CVE-2026-103418

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#21410 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement