Privilege escalation due to incorrect boundary conditions in the Graphics component

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-100782
StatePUBLISHED
Assignermozilla
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-29 13:17:43 UTC
Updated2026-09-30 18:18:06 UTC
DescriptionPrivilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem Types: CWE-119 | CWE-119 CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mozilla Firefox unaffected 115.42 115.* rpm Not specified
CNA Mozilla Firefox unaffected 140.17 140.* rpm Not specified
CNA Mozilla Firefox unaffected 153.4 153.* rpm Not specified
CNA Mozilla Firefox unaffected 157 * rpm Not specified
CNA Mozilla Thunderbird unaffected 140.17 140.* rpm Not specified
CNA Mozilla Thunderbird unaffected 153.4 153.* rpm Not specified
CNA Mozilla Thunderbird unaffected 157 * rpm Not specified

References

ReferenceSourceLinkTags
www.mozilla.org/security/advisories/mfsa2026-102 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-103 [email protected] www.mozilla.org
bugzilla.mozilla.org/show_bug.cgi [email protected] bugzilla.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-101 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-97 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-100 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-99 [email protected] www.mozilla.org
www.mozilla.org/security/advisories/mfsa2026-98 [email protected] www.mozilla.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Mozilla (en)

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