TI-2019-08796 Aliases CVE-2019-11739 GHSA-c6f3-q26v-xmx7

Cleartext transmission of sensitive information in Mozilla Thunderbird

LOW 31CWE-319Published 2019-09-27 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 7 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-319.

Summary

Encrypted S/MIME parts in a crafted multipart/alternative message can leak plaintext when included in a a HTML reply/forward. This vulnerability affects Thunderbird < 68.1 and Thunderbird < 60.9.

Why it matters now

EPSS 0.00905 60th percentileScored 2026-11-07

Fix Partial Thunderbird (Mozilla): 68.1, 60.9Red Hat: 3 advisoriesRed Hat: 7 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Thunderbird	before 68.1; before 60.9	68.1, 60.9	Patch available	CNA

Thunderbird VendorMozilla Affected before 68.1; before 60.9 Fixed in 68.1, 60.9 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:thunderbird::::::::	before 60.9.0; 68.0 to before 68.1.0	Vulnerable	Mozilla

cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.9.0; 68.0 to before 68.1.0 Vulnerable ·Mozilla

Remediation

Fix · CNA Thunderbird (Mozilla) Fixed in 68.1, 60.9

Red Hat 3 advisories

RHSA-2019:2807 Released 2019-09-19 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux Desktop (v. 6) thunderbird-60.9.0-1.el6_10
- Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-60.9.0-1.el6_10
- Red Hat Enterprise Linux Workstation (v. 6) thunderbird-60.9.0-1.el6_10
RHSA-2019:2773 Released 2019-09-19 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-60.9.0-1.el7_7
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-60.9.0-1.el7_7
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-60.9.0-1.el7_7
RHSA-2019:2774 Released 2019-09-16 · Red Hat rating Important
thunderbird security update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-60.9.0-2.el8_0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2019-09-27
Mozilla Thunderbird — USN-4150-1
7 records Highest priority Priority MEDIUM 3 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2019-08809 Use after free in Mozilla FirefoxPriority MEDIUM 42
- TI-2019-08803 Use after free in Mozilla FirefoxPriority MEDIUM 41
- TI-2019-08797 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 41
Show all 7 records → Advisory →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 5	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	RHSA-2019:2774
Red Hat Enterprise Linux Client (v. 7)	Fixed	RHSA-2019:2773
Red Hat Enterprise Linux Desktop (v. 6)	Fixed	RHSA-2019:2807
Red Hat Enterprise Linux Server Optional (v. 6)	Fixed	RHSA-2019:2807
Red Hat Enterprise Linux Server Optional (v. 7)	Fixed	RHSA-2019:2773
Red Hat Enterprise Linux Workstation (v. 6)	Fixed	RHSA-2019:2807
Red Hat Enterprise Linux Workstation (v. 7)	Fixed	RHSA-2019:2773

Timeline

2026-10-02 Threatist record created from CVE-2019-11739
2026-10-03 Alias added: GHSA-c6f3-q26v-xmx7

References

Advisory 6

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