CVE-2026-7323
published 2026-04-28CVE-2026-7323: Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that…
PriorityP343high7.3CVSS 3.1
AVNACLPRNUINSUCLILAL
EPSS
0.38%
29.8th percentile
Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. 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 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 150.0.1 | Firefox 150.0.1 |
| mozilla | firefox | < 140.10.1 | 140.10.1 |
| mozilla | firefox | < 150.0.1 | 150.0.1 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < Firefox ESR 140.10.1 | Firefox ESR 140.10.1 |
| mozilla | thunderbird | < Thunderbird 150.0.1 | Thunderbird 150.0.1 |
| mozilla | thunderbird | < Thunderbird 140.10.1 | Thunderbird 140.10.1 |
| mozilla | thunderbird | < 140.10.1 | 140.10.1 |
| mozilla | thunderbird | < 150.0.1 | 150.0.1 |
| mozilla | thunderbird | — | — |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
CVSS provenance
nvdv3.17.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
vendor_redhat7.3HIGH
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Red Hat
firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1
vendor_redhat·2026-04-28·CVSS 7.3
CVE-2026-7323 [HIGH] firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1
firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. 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.
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: th
Mozilla
Mozilla Foundation Security Advisory 2026-38: CVE-2026-7323
vendor_mozilla·CVSS 7.3
CVE-2026-7323 [HIGH] Mozilla Foundation Security Advisory 2026-38: CVE-2026-7323
Mozilla Foundation Security Advisory 2026-38
CVE: CVE-2026-7323
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 150.0.1
Mozilla
Mozilla Foundation Security Advisory 2026-39: CVE-2026-7323
vendor_mozilla·CVSS 7.3
CVE-2026-7323 [HIGH] Mozilla Foundation Security Advisory 2026-39: CVE-2026-7323
Mozilla Foundation Security Advisory 2026-39
CVE: CVE-2026-7323
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.10.1
Mozilla
Mozilla Foundation Security Advisory 2026-35: CVE-2026-7323
vendor_mozilla
CVE-2026-7323 Mozilla Foundation Security Advisory 2026-35: CVE-2026-7323
Mozilla Foundation Security Advisory 2026-35
CVE: CVE-2026-7323
Product: Firefox
Impact: high
Fixed in: Firefox 150.0.1
Mozilla
Mozilla Foundation Security Advisory 2026-36: CVE-2026-7323
vendor_mozilla
CVE-2026-7323 Mozilla Foundation Security Advisory 2026-36: CVE-2026-7323
Mozilla Foundation Security Advisory 2026-36
CVE: CVE-2026-7323
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.10.1
GHSA
GHSA-9wpv-xc33-5cm6: Memory safety bugs present in Firefox ESR 140
ghsa_unreviewed·2026-04-28
CVE-2026-7323 [HIGH] CWE-119 GHSA-9wpv-xc33-5cm6: Memory safety bugs present in Firefox ESR 140
Memory safety bugs present in Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and Thunderbird 150.0.0. 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 150.0.1 and Firefox ESR 140.10.1.
VulDB
Mozilla Thunderbird up to 150.0.0 memory corruption
vuldb·2026-04-28·CVSS 7.3
CVE-2026-7323 [HIGH] Mozilla Thunderbird up to 150.0.0 memory corruption
A vulnerability, which was classified as critical, was found in Mozilla Thunderbird up to 150.0.0. This impacts an unknown function. Such manipulation leads to memory corruption.
This vulnerability is traded as CVE-2026-7323. The attack may be launched remotely. There is no exploit available.
You should upgrade the affected component.
VulDB
Mozilla Firefox up to 150.0.0 memory corruption
vuldb·2026-04-28·CVSS 7.3
CVE-2026-7323 [HIGH] Mozilla Firefox up to 150.0.0 memory corruption
A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 150.0.0. This affects an unknown function. This manipulation causes memory corruption.
This vulnerability appears as CVE-2026-7323. The attack may be initiated remotely. There is no available exploit.
It is advisable to upgrade the affected component.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-7323 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1
bugzilla·2026-04-28·CVSS 7.3
CVE-2026-7323 [HIGH] CVE-2026-7323 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1
CVE-2026-7323 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1
Memory safety bugs present in Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and Thunderbird 150.0.0. 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 150.0.1 and Firefox ESR 140.10.1.
Hackernews
⚡ Weekly Recap: AI-Powered Phishing, Android Spying Tool, Linux Exploit, GitHub RCE & More
blogs_hackernews·2026-05-04·CVSS 9.3
CVE-2026-41940 [CRITICAL] ⚡ Weekly Recap: AI-Powered Phishing, Android Spying Tool, Linux Exploit, GitHub RCE & More
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## ⚡ Weekly Recap: AI-Powered Phishing, Android Spying Tool, Linux Exploit, GitHub RCE & More
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2026-04-28
Published