CVE-2024-26283

HIGHNVD 7.87.8—

7.8

An attacker could have executed unauthorized scripts on top origin sites using a JavaScript URI when opening an external URL with a custom Firefox scheme. This vulnerability affects Firefox for iOS < 123.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 31.7%
KEV: Not listed

Published

February 22, 2024

Last Modified

March 27, 2025

References (4)

security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1850158
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2024-08/
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.mozilla.org/show_bug.cgi?id=1850158
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2024-08/

Weakness Classification(1)

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

CWE-83

Data Freshness Timeline

(refreshed 14× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
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2026-06-01 13:51 UTCepss_batch
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2026-05-31 22:30 UTCepss_batch
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2026-05-29 13:43 UTCepss_batch
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2026-05-27 13:40 UTCepss_batch
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2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch

Frequently asked(5)

What is CVE-2024-26283?

CVE-2024-26283 is a high vulnerability published on February 22, 2024. An attacker could have executed unauthorized scripts on top origin sites using a JavaScript URI when opening an external URL with a custom Firefox scheme. This vulnerability affects Firefox for iOS < 123.

When was CVE-2024-26283 disclosed?

CVE-2024-26283 was first published in the National Vulnerability Database on February 22, 2024, with the most recent update on March 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-26283 actively exploited?

CVE-2024-26283 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-26283?

CVE-2024-26283 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2024-26283?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-26283, 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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CVE-2024-26283

📅 Published

🔄 Last Modified

🔗 References (4)