Read the docs
TI-2019-07180 Aliases CVE-2019-9794GHSA-2cx8-vq8f-mwm5

A vulnerability was discovered where specific command line arguments are not properly…

Priority MEDIUM 46CWE-88Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-88.

Summary

A vulnerability was discovered where specific command line arguments are not properly discarded during Firefox invocation as a shell handler for URLs. This could be used to retrieve and execute files whose location is supplied through these command line arguments if Firefox is configured as the default URI handler for a given URI scheme in third party applications and these applications insufficiently sanitize URL data. *Note: This issue only affects Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Why it matters now

EPSS 0.01774 78th percentileScored 2026-11-07
Fix Fixed Thunderbird (Mozilla): 60.6Firefox ESR (Mozilla): 60.6+1 more product

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 60.660.6Patch availableCNA
MozillaFirefox ESRbefore 60.660.6Patch availableCNA
MozillaFirefoxbefore 6666Patch availableCNA
  • Thunderbird VendorMozilla Affected before 60.6 Fixed in 60.6 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 60.6 Fixed in 60.6 Patch available CNA
  • Firefox VendorMozilla Affected before 66 Fixed in 66 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 60.6.0; before 66.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 60.6.0VulnerableMozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 60.6.0; before 66.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.6.0 Vulnerable ·Mozilla
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 60.6
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 60.6
  • Fix · CNA Firefox (Mozilla) Fixed in 66

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 66

    21 records Highest priority Priority MEDIUM 10 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2019-07177 Type confusion in Mozilla ThunderbirdPriority MEDIUM 61
    • TI-2019-07178 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 57
    • TI-2019-07190 OS command injection in Mozilla FirefoxPriority MEDIUM 46
    Show all 21 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 60.6

    9 records Highest priority Priority MEDIUM 7 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-07177 Type confusion in Mozilla ThunderbirdPriority MEDIUM 61
    • TI-2019-07178 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 57
    • TI-2019-07182 Use after free in Mozilla ThunderbirdPriority MEDIUM 46
    Show all 9 records →

Vendor assessments

Red Hat

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

Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-9794
  2. 2026-10-03 Alias added: GHSA-2cx8-vq8f-mwm5

References

Advisory 4

  • 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