What’s Vulnerable › Vulnerabilities

CVE-2026-103418: Universal XSS via the HTML language attribute in Translation Services

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-13 · updated 2026-10-14
• Weakness: CWE-79

Description

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.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2062109
• https://www.mozilla.org/security/advisories/mfsa2026-105/

Get alerted when CVE-2026-103418 or the next vulnerability affects your stack