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CVE-2026-7323

33
FAUCET Score

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.

First published: Apr 28, 2026Last modified: May 7, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 140.10.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
< 150.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
< 140.10.1CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
< 150.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 28th percentile among its peer group of 1,572 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.6 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

References

access.redhat.com / errata/RHSA-2026:19153
access.redhat.com / errata/RHSA-2026:19157
access.redhat.com / errata/RHSA-2026:19348
access.redhat.com / errata/RHSA-2026:19370
access.redhat.com / errata/RHSA-2026:19588
access.redhat.com / errata/RHSA-2026:20586
access.redhat.com / errata/RHSA-2026:21743
access.redhat.com / errata/RHSA-2026:22324
access.redhat.com / errata/RHSA-2026:22408
access.redhat.com / errata/RHSA-2026:22409
access.redhat.com / errata/RHSA-2026:22410
access.redhat.com / errata/RHSA-2026:22708
access.redhat.com / errata/RHSA-2026:22712
access.redhat.com / errata/RHSA-2026:22847
access.redhat.com / errata/RHSA-2026:24345
access.redhat.com / errata/RHSA-2026:24717
access.redhat.com / errata/RHSA-2026:24718
access.redhat.com / errata/RHSA-2026:24719
access.redhat.com / errata/RHSA-2026:24721
access.redhat.com / errata/RHSA-2026:24844
access.redhat.com / errata/RHSA-2026:24846
access.redhat.com / errata/RHSA-2026:25014
access.redhat.com / security/cve/CVE-2026-7323
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-7323.json
bugzilla.mozilla.org / buglist.cgi
Broken Link
mozilla.org / security/advisories/mfsa2026-35
Vendor Advisory
mozilla.org / security/advisories/mfsa2026-36
Vendor Advisory
mozilla.org / security/advisories/mfsa2026-38
Vendor Advisory
mozilla.org / security/advisories/mfsa2026-39
Vendor Advisory