What’s Vulnerable › Vulnerabilities

CVE-2022-26384

• Severity: critical (CVSS 9.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-12-22 · updated 2026-06-17
• Weakness: CWE-693

Description

If an attacker could control the contents of an iframe sandboxed with <code>allow-popups</code> but not <code>allow-scripts</code>, they were able to craft a link that, when clicked, would lead to JavaScript execution in violation of the sandbox. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.

Affected products

• Mozilla Firefox: before 98.0 — fixed in 98.0
• Mozilla Firefox ESR: before 91.7 — fixed in 91.7
• Mozilla Thunderbird: before 91.7 — fixed in 91.7

How to fix

Upgrade to a fixed version: Mozilla Firefox 98.0; Mozilla Firefox ESR 91.7; Mozilla Thunderbird 91.7. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1744352
• https://www.mozilla.org/security/advisories/mfsa2022-10/
• https://www.mozilla.org/security/advisories/mfsa2022-11/
• https://www.mozilla.org/security/advisories/mfsa2022-12/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1744352
• https://www.mozilla.org/security/advisories/mfsa2022-10/
• https://www.mozilla.org/security/advisories/mfsa2022-11/
• https://www.mozilla.org/security/advisories/mfsa2022-12/

Get alerted when CVE-2022-26384 or the next vulnerability affects your stack