CVE-2026-4684 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.5 HIGH	NETWORK	HIGH	NONE	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA-ADP	ADP	7.5 HIGH	NETWORK	HIGH	NONE	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Affected Products (NVD)

Vendor	Product	Version
mozilla	firefox_esr	𝑥 < 115.34.0
mozilla	firefox	𝑥 < 149.0
mozilla	firefox_esr	128.0 ≤ 𝑥 < 140.9.0

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

firefox

sid	vulnerable

firefox-esr

bookworm	vulnerable
bookworm (security)	140.9.0esr-1~deb12u1 fixed
bullseye	vulnerable
bullseye (security)	vulnerable
forky	vulnerable
sid	140.9.0esr-1 fixed
trixie	vulnerable
trixie (security)	140.9.0esr-1~deb13u1 fixed

thunderbird

bookworm	vulnerable
bookworm (security)	vulnerable
bullseye	vulnerable
bullseye (security)	vulnerable
forky	vulnerable
sid	1:140.9.0esr-1 fixed
trixie	vulnerable
trixie (security)	vulnerable

Common Weakness Enumeration

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2011129

https://www.mozilla.org/security/advisories/mfsa2026-20/

https://www.mozilla.org/security/advisories/mfsa2026-21/

https://www.mozilla.org/security/advisories/mfsa2026-22/

https://www.mozilla.org/security/advisories/mfsa2026-23/

https://www.mozilla.org/security/advisories/mfsa2026-24/