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TI-2026-06430 Aliases CVE-2026-7323GHSA-9wpv-xc33-5cm6

Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

Priority MEDIUM 40CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Partial Red Hat: 15 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00375 31st percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 140.10.1, 150.0.1Thunderbird (Mozilla): 140.10.1, 150.0.1Red Hat: 22 advisoriesRed Hat: 15 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox—140.10.1, 150.0.1Patch availableCNA
MozillaThunderbird—140.10.1, 150.0.1Patch availableCNA
  • Firefox VendorMozilla Affected — Fixed in 140.10.1, 150.0.1 Patch available CNA
  • Thunderbird VendorMozilla Affected — Fixed in 140.10.1, 150.0.1 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*before 140.10.1VulnerableMozilla
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*before 150.0.1VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*before 140.10.1VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*before 150.0.1VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* Versions before 140.10.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* Versions before 150.0.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* Versions before 140.10.1 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* Versions before 150.0.1 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 140.10.1, 150.0.1
  • Fix · CNA Thunderbird (Mozilla) Fixed in 140.10.1, 150.0.1

Red Hat 22 advisories

  • RHSA-2026:25014 Released 2026-06-10 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) thunderbird-140.10.1-1.el8_6
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) thunderbird-140.10.1-1.el8_6
  • RHSA-2026:24846 Released 2026-06-09 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) thunderbird-140.10.1-1.el9_4
  • RHSA-2026:24844 Released 2026-06-09 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) thunderbird-140.10.1-1.el9_2
Show 19 more Red Hat advisories
  • RHSA-2026:24721 Released 2026-06-09 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) thunderbird-140.10.1-1.el9_6
  • RHSA-2026:24717 Released 2026-06-09 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) thunderbird-140.10.1-1.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) thunderbird-140.10.1-1.el8_8
  • RHSA-2026:24719 Released 2026-06-09 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) thunderbird-140.10.1-1.el10_0
  • RHSA-2026:24718 Released 2026-06-09 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-140.10.1-1.el8_4
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) thunderbird-140.10.1-1.el8_4
  • RHSA-2026:24345 Released 2026-06-08 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox-140.10.1-1.el8_6
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) firefox-140.10.1-1.el8_6
  • RHSA-2026:22847 Released 2026-06-03 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) firefox-140.10.1-1.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) firefox-140.10.1-1.el8_8
  • RHSA-2026:22712 Released 2026-06-03 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-140.10.1-1.el8_4
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) firefox-140.10.1-1.el8_4
  • RHSA-2026:22708 Released 2026-06-03 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) firefox-140.10.1-1.el7_9
  • RHSA-2026:22409 Released 2026-06-02 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) firefox-140.10.1-1.el9_6, firefox-x11-140.10.1-1.el9_6
  • RHSA-2026:22408 Released 2026-06-02 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) firefox-140.10.1-1.el10_0
  • RHSA-2026:22410 Released 2026-06-02 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) firefox-140.10.1-1.el9_2, firefox-x11-140.10.1-1.el9_2
  • RHSA-2026:22324 Released 2026-06-01 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) firefox-140.10.1-1.el9_4, firefox-x11-140.10.1-1.el9_4
  • RHSA-2026:21743 Released 2026-05-28 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox-140.10.1-1.el9_0
  • RHSA-2026:20586 Released 2026-05-26 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-140.10.1-1.el8_10
  • RHSA-2026:19588 Released 2026-05-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-140.10.1-1.el8_10
  • RHSA-2026:19348 Released 2026-05-19 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-140.10.1-1.el9_8
  • RHSA-2026:19370 Released 2026-05-19 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-140.10.1-1.el9_8, firefox-x11-140.10.1-1.el9_8
  • RHSA-2026:19153 Released 2026-05-19 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 10) thunderbird-140.10.1-1.el10_2
  • RHSA-2026:19157 Released 2026-05-19 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 10) firefox-140.10.1-1.el10_2

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:19153, RHSA-2026:19157
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:19588, RHSA-2026:20586
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:19348, RHSA-2026:19370
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:22712, RHSA-2026:24718
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:24345, RHSA-2026:25014
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:22847, RHSA-2026:24717
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:21743
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:22410, RHSA-2026:24844
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:22324, RHSA-2026:24846
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:22408, RHSA-2026:24719
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:22409, RHSA-2026:24721
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:22712, RHSA-2026:24718
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:24345, RHSA-2026:25014
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:22847, RHSA-2026:24717
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:22708

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7323
  2. 2026-10-03 Alias added: GHSA-9wpv-xc33-5cm6

References

Advisory 4

Other 1

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences