A file dialog shown while in full-screen mode could have resulted in the window remaining disabled.

published 2024-05-14 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-44369

cvss: 8.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits: 0; none known

A file dialog shown while in full-screen mode could have resulted in the window remaining disabled. This vulnerability affects Firefox < 126.

Patch / fix

fixed in 1 distros 2

Mozilla Firefox 126

ubuntu opensuse

firefox Ubuntu 20.04 LTS 126.0+build2-0ubuntu0.20.04.1

ubuntu advisories UBUNTU-CVE-2024-4776

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
MozillaFirefox openSUSE Tumbleweed 126.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:13980-1

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-05-15)

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1887343 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:H
CNA	3.1	8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:H

Affected products

Mozilla Firefox

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

bugzilla.mozilla.org /show_bug.cgi?id=1887343
exploit, issue-tracking, vendor-advisory
mozilla.org /security/advisories/mfsa2024-21/
vendor-advisory

Sources

CVE List CVE-2024-4776
NVD CVE-2024-4776

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary