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
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 9.6Exploit: Elevated riskExposed services: Not assessed

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
9.6CRITICALmedium confidence
EG Risk
59
EG Risk 59/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity96% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.0%
EPSS %ILE
60th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

December 22, 2022

Last Modified

April 16, 2025

Advisory Details (4)

Auto-updated Oct 2, 2026
Patch available.
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 / EcosystemFix (by version range) / 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.

Affected Packages

(12 across 6 ecosystems)
Debian:10(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr60.7.2esr-1 ... 91.7.0esr-1~deb9u1 (138 versions)
  • every version up to 91.7.0esr-1~deb10u1: fixed in 91.7.0esr-1~deb10u1
—
thunderbird1:60.7.2-1 ... 1:91.7.0-2~deb9u1 (175 versions)
  • every version up to 1:91.7.0-2~deb10u1: fixed in 1:91.7.0-2~deb10u1
—
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr78.12.0esr-1 ... 91.7.0esr-1~deb9u1 (36 versions)
  • every version up to 91.7.0esr-1~deb11u1: fixed in 91.7.0esr-1~deb11u1
—
thunderbird1:78.12.0-1 ... 1:91.7.0-2~deb9u1 (52 versions)
  • every version up to 1:91.7.0-2~deb11u1: fixed in 1:91.7.0-2~deb11u1
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 91.7.0esr-1: fixed in 91.7.0esr-1
—
thunderbird—
  • every version up to 1:91.7.0-1: fixed in 1:91.7.0-1
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 91.7.0esr-1: fixed in 91.7.0esr-1
—
thunderbird—
  • every version up to 1:91.7.0-1: fixed in 1:91.7.0-1
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr—
  • every version up to 91.7.0esr-1: fixed in 91.7.0esr-1
—
thunderbird—
  • every version up to 1:91.7.0-1: fixed in 1:91.7.0-1
—
Debian:9(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr45.9.0esr-1 ... 91.6.1esr-1~deb9u1 (245 versions)
  • every version up to 91.7.0esr-1~deb9u1: fixed in 91.7.0esr-1~deb9u1
—
thunderbird1.5-4 ... 1:91.7.0-1 (256 versions)
  • every version up to 1:91.7.0-2~deb9u1: fixed in 1:91.7.0-2~deb9u1
—

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 8× in last 7d / 25× 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 174 total refreshes for this CVE.

  1. 2026-10-09 20:04 UTCEPSS rescore
  2. 2026-10-08 16:40 UTCEPSS rescore
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  1. 2026-09-08 21:57 UTCEPSS rescore
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  5. 2026-09-04 19:59 UTCOSV refresh
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  22. 2026-08-18 07:22 UTCOSV refresh
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  46. 2026-07-23 02:09 UTCEG score recompute
  47. 2026-07-22 22:56 UTCEG score recompute
  48. 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 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 1.0% probability of exploitation in the next 30 days (60th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2022-26384 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-26384 are linked in the Vendor Advisories panel on this page.

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