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TI-2024-01803 Aliases CVE-2024-1936GHSA-8v87-67f4-56h2

Insecure storage of sensitive information in Mozilla Thunderbird

Priority HIGH 68CWE-922Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 15 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-922.

Summary

The encrypted subject of an email message could be incorrectly and permanently assigned to an arbitrary other email message in Thunderbird's local cache. Consequently, when replying to the contaminated email message, the user might accidentally leak the confidential subject to a third-party. While this update fixes the bug and avoids future message contamination, it does not automatically repair existing contaminations. Users are advised to use the repair folder functionality, which is available from the context menu of email folders, which will erase incorrect subject assignments. This vulnerability affects Thunderbird < 115.8.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00682 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Thunderbird (Mozilla): 115.8.1Red Hat: 9 advisoriesRed Hat: 15 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
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
MozillaThunderbirdbefore 115.8.1115.8.1Patch availableCNA
  • Thunderbird VendorMozilla Affected before 115.8.1 Fixed in 115.8.1 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 115.8.1VulnerableMozilla
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 115.8.1 Vulnerable ·Mozilla
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 115.8.1

Red Hat 9 advisories

  • RHSA-2024:1496 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.8) thunderbird-115.9.0-1.el8_8
  • RHSA-2024:1497 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-115.9.0-1.el8_6
  • RHSA-2024:1500 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-115.9.0-1.el8_2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-115.9.0-1.el8_2
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-115.9.0-1.el8_2
Show 6 more Red Hat advisories
  • RHSA-2024:1498 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-115.9.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-115.9.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-115.9.0-1.el7_9
  • RHSA-2024:1494 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-115.9.0-1.el8_9
  • RHSA-2024:1492 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) thunderbird-115.9.0-1.el9_2
  • RHSA-2024:1493 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-115.9.0-1.el9_3
  • RHSA-2024:1495 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-115.9.0-1.el9_0
  • RHSA-2024:1499 Released 2024-03-25 · Red Hat rating Moderate
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-115.9.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-115.9.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-115.9.0-1.el8_4

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2024:1494
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:1493
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2024:1500
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2024:1499
Red Hat Enterprise Linux AppStream E4S (v. 8.2)Fixed RHSA-2024:1500
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2024:1499
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2024:1497
Red Hat Enterprise Linux AppStream EUS (v.8.8)Fixed RHSA-2024:1496
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2024:1495
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:1492
Red Hat Enterprise Linux AppStream TUS (v. 8.2)Fixed RHSA-2024:1500
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2024:1499
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2024:1498
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2024:1498
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2024:1498

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-1936
  2. 2026-10-03 Alias added: GHSA-8v87-67f4-56h2

References

Exploit 1

Advisory 1

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 2067 →

Sources

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