CVE-2026-109738 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
mozilla	CNA	5.4 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 12.9%

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
mozilla	firefox	𝑥 < 158	CNA
mozilla	firefox_esr	116.0.0 ≤ 𝑥 < 153.5	CNA
mozilla	thunderbird	𝑥 < 158	CNA
mozilla	thunderbird_esr	𝑥 < 153.5	CNA

Debian Releases

Debian Product

Codename

firefox

sid	vulnerable

firefox-esr

bookworm	vulnerable
bookworm (security)	vulnerable
forky	vulnerable
sid	153.5.0esr-1 fixed
trixie	vulnerable
trixie (security)	153.5.0esr-1~deb13u1 fixed

thunderbird

bookworm	vulnerable
bookworm (security)	vulnerable
forky	vulnerable
sid	vulnerable
trixie	vulnerable
trixie (security)	vulnerable

Common Weakness Enumeration

CWE-416 - Use After Free
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

Vulnerability Media Exposure

[GERMAN] Mozilla Firefox und Thunderbrid: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Mozilla Thunderbrid ausnutzen, um seine Privilegien zu erhöhen, Sicherheitsmaßnahmen zu umgehen, Spoofing-Angriffe durchzuführen, Daten offenzulegen oder zu manipulieren, Denial-of-Service-Zustände zu verursachen oder andere, nicht näher spezifizierte Angriffe durchzuführen.
Published: 2026-10-13T22:00:00+00:00

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2047722

https://www.mozilla.org/security/advisories/mfsa2026-106/

https://www.mozilla.org/security/advisories/mfsa2026-108/

https://www.mozilla.org/security/advisories/mfsa2026-109/

https://www.mozilla.org/security/advisories/mfsa2026-110/