CVE-2022-26384

CRITICALNVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2022-12-22. NVD baseline CVSS 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.6Exploit: NoneExposed: 0

A fix is available — apply it.

If an attacker could control the contents of an iframe sandboxed with allow-popups but not allow-scripts, 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.

CVSS v3
9.6
EG Score
9.6(medium)
EPSS
56.9%
KEV
Not listed

Published

December 22, 2022

Last Modified

April 16, 2025

Advisory Details (4)

Auto-updated Jul 14, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 91.7 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2022-12/
generic

Security Vulnerabilities fixed in Firefox ESR 91.7 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2022-11/
generic

Security Vulnerabilities fixed in Firefox 98 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2022-10/
generic

1744352 - (CVE-2022-26384) Sandboxed iFrame XSS - javascript URI's run with target _blank

https://bugzilla.mozilla.org/show_bug.cgi?id=1744352

Vendor Advisories for CVE-2022-26384(10)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntufirefox-locale-ast (98.0+build3-0ubuntu0.20.04.2) @ focal2026-05-25ubuntu
ubuntufirefox-locale-ast (98.0.1+build2-0ubuntu0.21.10.1) @ impish2026-05-25ubuntu
ubuntuthunderbird-locale-id (1:91.7.0+build2-0ubuntu0.18.04.1) @ bionic2026-05-25ubuntu
redhatthunderbird-0:91.7.0-2.el8_22022-03-14redhat
redhatthunderbird-0:91.7.0-2.el8_52022-03-14redhat
redhatthunderbird-0:91.7.0-2.el8_12022-03-14redhat
redhatthunderbird-0:91.7.0-2.el8_42022-03-14redhat
redhatthunderbird-0:91.7.0-2.el7_92022-03-14redhat
redhatfirefox-0:91.7.0-3.el8_52022-03-10redhat
redhatfirefox-0:91.7.0-3.el8_12022-03-10redhat
redhatfirefox-0:91.7.0-3.el8_22022-03-10redhat
redhatfirefox-0:91.7.0-3.el7_92022-03-10redhat
redhatfirefox-0:91.7.0-3.el8_42022-03-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 102 total refreshes for this CVE.

  1. 2026-07-22 14:06 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2022-26384?
CVE-2022-26384 is a critical vulnerability published on December 22, 2022. 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…
When was CVE-2022-26384 disclosed?
CVE-2022-26384 was first published in the National Vulnerability Database on December 22, 2022, with the most recent update on April 16, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-26384 actively exploited?
CVE-2022-26384 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 56.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-26384?
CVE-2022-26384 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2022-26384?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-26384, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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