CVE-2022-26384

Name: CVE-2022-26384
Creator: NVD / NIST
Published: 2022-12-22T20:15:21.697+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.6/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2022-26384 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. 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.. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.6/10

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

EPSS Probability

0.93%

56.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-693

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 98.0
Mozilla	Firefox Esr	< 91.7
Mozilla	Thunderbird	< 91.7

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1744352Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-11/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-12/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1744352Exploit, Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-11/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-12/Vendor Advisory

Timeline

Published: Dec 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-26384?

How severe is CVE-2022-26384?

CVE-2022-26384 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2022-26384?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-26384?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST