Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153
Summary
| CVE | CVE-2026-16360 |
|---|---|
| State | PUBLISHED |
| Assigner | mozilla |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-21 13:17:04 UTC |
| Updated | 2026-07-22 20:16:51 UTC |
| Description | Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152. 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 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001440000 probability, percentile 0.040990000 (date 2026-07-22)
Problem Types: CWE-119 | CWE-119 CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Mozilla | Firefox | unaffected 115.38 115.* rpm | Not specified |
| CNA | Mozilla | Firefox | unaffected 140.13 140.* rpm | Not specified |
| CNA | Mozilla | Firefox | unaffected 153 * rpm | Not specified |
| CNA | Mozilla | Thunderbird | unaffected 140.13 140.* rpm | Not specified |
| CNA | Mozilla | Thunderbird | unaffected 153 * rpm | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| bugzilla.mozilla.org/buglist.cgi | [email protected] | bugzilla.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-72 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-70 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-71 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-69 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-68 | [email protected] | www.mozilla.org | |
| bugzilla.mozilla.org/buglist.cgi | [email protected] | bugzilla.mozilla.org | |
| https://bugzilla.mozilla.org/buglist.cgi?bug_id=2022635%2C2028004%2C2035756%2C2045184%2C2045185%2C2045198%2C2045392%2C2045395%2C2045396%2C2045397%2C2045405%2C2045414%2C2045415%2C2045451%2C2045454%2C2045508%2C2045510%2C2045513%2C2045515%2C2045518%2C2045604%2C2045607%2C2045612%2C2045617%2C2045619%2C2045624%2C2045625%2C2045729%2C2045737%2C2045741%2C2045742%2C2045763%2C2045767%2C2045770%2C2045772%2C2045773%2C2045783%2C2045833%2C2045848%2C2045865%2C2045875%2C2045957%2C2047723%2C2047729%2C2048795%2C2048799%2C2048801%2C2049392%2C2049397%2C2049398%2C2049399%2C2049404%2C2049405%2C2049407%2C2049812%2C2050657%2C2050668%2C2050990%2C2053166%2C2053273%2C2053576%2C2053583%2C2053587 | MITRE | bugzilla.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: Andrew McCreight, Jan de Mooij, Tom Ritter, Vincent Hilla and the Mozilla Fuzzing Team (en)
There are currently no legacy QID mappings associated with this CVE.