CVE-2026-12328
published 2026-06-16CVE-2026-12328: Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed…
PriorityP349high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
0.48%
37.9th percentile
Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. 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 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 152 | Firefox 152 |
| mozilla | firefox | < 115.37.0 | 115.37.0 |
| mozilla | firefox | < 152.0 | 152.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 140.0 < 140.12.0 | 140.12.0 |
| mozilla | firefox_esr | < Firefox ESR 115.37 | Firefox ESR 115.37 |
| mozilla | firefox_esr | < Firefox ESR 140.12 | Firefox ESR 140.12 |
| mozilla | thunderbird | < Thunderbird 152 | Thunderbird 152 |
| mozilla | thunderbird | < Thunderbird 140.12 | Thunderbird 140.12 |
| mozilla | thunderbird | < 152.0.0 | 152.0.0 |
| mozilla | thunderbird | — | — |
| mozilla | thunderbird | >= 140.0 < 140.12.0 | 140.12.0 |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat8.1HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152
vendor_redhat·2026-06-16·CVSS 8.1
CVE-2026-12328 [HIGH] CWE-825 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152
firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152
Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. 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 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird
Mozilla
Mozilla Foundation Security Advisory 2026-57: CVE-2026-12328
vendor_mozilla·CVSS 8.1
CVE-2026-12328 [HIGH] Mozilla Foundation Security Advisory 2026-57: CVE-2026-12328
Mozilla Foundation Security Advisory 2026-57
CVE: CVE-2026-12328
Product: Firefox
Impact: high
Fixed in: Firefox 152
Mozilla
Mozilla Foundation Security Advisory 2026-60: CVE-2026-12328
vendor_mozilla·CVSS 8.1
CVE-2026-12328 [HIGH] Mozilla Foundation Security Advisory 2026-60: CVE-2026-12328
Mozilla Foundation Security Advisory 2026-60
CVE: CVE-2026-12328
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 152
Mozilla
Mozilla Foundation Security Advisory 2026-59: CVE-2026-12328
vendor_mozilla·CVSS 8.1
CVE-2026-12328 [HIGH] Mozilla Foundation Security Advisory 2026-59: CVE-2026-12328
Mozilla Foundation Security Advisory 2026-59
CVE: CVE-2026-12328
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.37
Mozilla
Mozilla Foundation Security Advisory 2026-58: CVE-2026-12328
vendor_mozilla·CVSS 8.1
CVE-2026-12328 [HIGH] Mozilla Foundation Security Advisory 2026-58: CVE-2026-12328
Mozilla Foundation Security Advisory 2026-58
CVE: CVE-2026-12328
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.12
Mozilla
Mozilla Foundation Security Advisory 2026-61: CVE-2026-12328
vendor_mozilla·CVSS 8.1
CVE-2026-12328 [HIGH] Mozilla Foundation Security Advisory 2026-61: CVE-2026-12328
Mozilla Foundation Security Advisory 2026-61
CVE: CVE-2026-12328
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.12
VulDB
Mozilla Firefox up to 151 memory corruption (Nessus ID 321204)
vuldb·2026-06-17·CVSS 8.1
CVE-2026-12328 [HIGH] Mozilla Firefox up to 151 memory corruption (Nessus ID 321204)
A vulnerability has been found in Mozilla Firefox up to 151 and classified as critical. The affected element is an unknown function. This manipulation causes memory corruption.
This vulnerability is handled as CVE-2026-12328. The attack can be initiated remotely. There is not any exploit available.
The affected component should be upgraded.
GHSA
Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151.
ghsa_unreviewed·2026-06-16
CVE-2026-12328 [HIGH] CWE-120 Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151.
Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. 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 152, Firefox ESR 140.12, and Firefox ESR 115.37.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-12328 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152
bugzilla·2026-06-16·CVSS 8.1
CVE-2026-12328 [HIGH] CVE-2026-12328 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152
CVE-2026-12328 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152
Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. 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 152, Firefox ESR 140.12, and Firefox ESR 115.37.
Hackernews
⚡ Weekly Recap: Browser Bugs, EDR Killers, TV Botnet, OpenBSD Flaw, Android Trojan, and More
blogs_hackernews·2026-06-22·CVSS 9.8
CVE-2026-24858 [CRITICAL] ⚡ Weekly Recap: Browser Bugs, EDR Killers, TV Botnet, OpenBSD Flaw, Android Trojan, and More
Home
Threat Intelligence
Vulnerabilities
Cyber Attacks
Webinars
Expert Insights
Awards
Webinars
Awards
Free eBooks
About THN
Jobs
Advertise with us
## ⚡ Weekly Recap: Browser Bugs, EDR Killers, TV Botnet, OpenBSD Flaw, Android Trojan, and More
It’s Monday again.
This week’s threat list looks painfully familiar: abused integrations, fake tools, poisoned websites, ransomware crews trying to shut down security tools, and mobile malware asking for way too much control.
The annoying part is how little of this feels new. Weak credentials, sketchy downloads, browser extensions with too much access, and WordPress sites are used to push more attacks. Nothing clever. Just sloppy, cheap, and effective.
Here’s the Monday recap. Let’s get into the week’s mess.
## ⚡ Threat of the We
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029402%2C2038477%2C2039726%2C2041373%2C2042268%2C2042451%2C2042782%2C2042858%2C2042929%2C2042965%2C2043213https://www.mozilla.org/security/advisories/mfsa2026-57/https://www.mozilla.org/security/advisories/mfsa2026-58/https://www.mozilla.org/security/advisories/mfsa2026-59/https://www.mozilla.org/security/advisories/mfsa2026-60/https://www.mozilla.org/security/advisories/mfsa2026-61/https://access.redhat.com/errata/RHSA-2026:27717https://access.redhat.com/errata/RHSA-2026:27733https://access.redhat.com/errata/RHSA-2026:27734https://access.redhat.com/errata/RHSA-2026:29940https://access.redhat.com/errata/RHSA-2026:30846https://access.redhat.com/errata/RHSA-2026:33445https://access.redhat.com/errata/RHSA-2026:36100https://access.redhat.com/errata/RHSA-2026:36101https://access.redhat.com/errata/RHSA-2026:36102https://access.redhat.com/errata/RHSA-2026:36103https://access.redhat.com/errata/RHSA-2026:37210https://access.redhat.com/errata/RHSA-2026:37391https://access.redhat.com/errata/RHSA-2026:38506https://access.redhat.com/errata/RHSA-2026:38750https://access.redhat.com/errata/RHSA-2026:38751https://access.redhat.com/errata/RHSA-2026:38753https://access.redhat.com/security/cve/CVE-2026-12328https://bugzilla.redhat.com/show_bug.cgi?id=2489218https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12328.json
2026-06-16
Published