Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
References
| Link | Resource |
|---|---|
| https://bugzilla.mozilla.org/buglist.cgi?bug_id=1860195%2C2029325%2C2029429%2C2029910%2C2035915%2C2038678%2C2038669 | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-46/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-47/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-48/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-50/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-51/ | Vendor Advisory |
Configurations
Configuration 1 (hide)
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History
26 May 2026, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (en) Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. |
20 May 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.8 |
20 May 2026, 14:40
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* |
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| First Time |
Mozilla thunderbird
Mozilla Mozilla firefox |
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| References | () https://bugzilla.mozilla.org/buglist.cgi?bug_id=1860195%2C2029325%2C2029429%2C2029910%2C2035915%2C2038678%2C2038669 - Permissions Required | |
| References | () https://www.mozilla.org/security/advisories/mfsa2026-46/ - Vendor Advisory | |
| References | () https://www.mozilla.org/security/advisories/mfsa2026-47/ - Vendor Advisory | |
| References | () https://www.mozilla.org/security/advisories/mfsa2026-48/ - Vendor Advisory | |
| References | () https://www.mozilla.org/security/advisories/mfsa2026-50/ - Vendor Advisory | |
| References | () https://www.mozilla.org/security/advisories/mfsa2026-51/ - Vendor Advisory |
19 May 2026, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
|
| Summary | (en) Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. |
19 May 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 9.8 |
| CWE | CWE-119 |
19 May 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-19 14:16
Updated : 2026-05-26 18:16
NVD link : CVE-2026-8975
Mitre link : CVE-2026-8975
CVE.ORG link : CVE-2026-8975
JSON object : View
Products Affected
mozilla
- firefox
- thunderbird
CWE
CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer