CVE-2026-100801

ALTO 8.8CVE-2026-100801 · Published 29/09/2026 · updated 27/10/2026

En resumen

CVE-2026-100801 es una vulnerabilidad ALTO (CVSS 8.8) que afecta a firefox (mozilla), thunderbird (mozilla).
Probabilidad de explotación en los próximos 30 días (EPSS): 0.28%, mayor que el 20.8% de las vulnerabilidades.
Solución: actualizar a 153.4.0, 157.0.0, 140.17.0, 157.0 o posterior.

Package	Affected versions	Patched versions
firefox mozilla	`≥ 141.0, < 153.4.0≥ 154.0.0, < 157.0.0< 140.17.0`	`153.4.0157.0.0140.17.0`
thunderbird mozilla	`≥ 141.0, < 153.4.0≥ 154.0, < 157.0< 140.17.0`	`153.4.0157.0140.17.0`

Description

Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159, Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17.

References

bugzilla.mozilla.org/show_bug.cgi · Permissions Required
mozilla.org/security/advisories/mfsa2026-100 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-101 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-102 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-103 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-118
mozilla.org/security/advisories/mfsa2026-120
mozilla.org/security/advisories/mfsa2026-121
mozilla.org/security/advisories/mfsa2026-122
mozilla.org/security/advisories/mfsa2026-97 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-99 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

≥ 141.0, < 153.4.0≥ 154.0.0, < 157.0.0< 140.17.0

153.4.0157.0.0140.17.0

thunderbird

mozilla

≥ 141.0, < 153.4.0≥ 154.0, < 157.0< 140.17.0

153.4.0157.0140.17.0

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