CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-6755

Mitigation bypass in the DOM: postMessage component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.002

EPSS Ranking 8.7%

CVSS Severity

CVSS v3 Score 6.5

References

Products affected by CVE-2026-6755

Mozilla » Firefox » Version: 10.0

cpe:2.3:a:mozilla:firefox:10.0
Mozilla » Firefox » Version: 10.0.1

cpe:2.3:a:mozilla:firefox:10.0.1
Mozilla » Firefox » Version: 10.0.2

cpe:2.3:a:mozilla:firefox:10.0.2
Mozilla » Firefox » Version: 100.0

cpe:2.3:a:mozilla:firefox:100.0
Mozilla » Firefox » Version: 100.0.1

cpe:2.3:a:mozilla:firefox:100.0.1
Mozilla » Firefox » Version: 100.0.2

cpe:2.3:a:mozilla:firefox:100.0.2
Mozilla » Firefox » Version: 100.3.0

cpe:2.3:a:mozilla:firefox:100.3.0
Mozilla » Firefox » Version: 101

cpe:2.3:a:mozilla:firefox:101
Mozilla » Firefox » Version: 101.0

cpe:2.3:a:mozilla:firefox:101.0
Mozilla » Firefox » Version: 101.0.1

cpe:2.3:a:mozilla:firefox:101.0.1
Mozilla » Firefox » Version: 102.0

cpe:2.3:a:mozilla:firefox:102.0
Mozilla » Firefox » Version: 102.0.1

cpe:2.3:a:mozilla:firefox:102.0.1
Mozilla » Firefox » Version: 102.1.0

cpe:2.3:a:mozilla:firefox:102.1.0
Mozilla » Firefox » Version: 102.10.0

cpe:2.3:a:mozilla:firefox:102.10.0
Mozilla » Firefox » Version: 102.11.0

cpe:2.3:a:mozilla:firefox:102.11.0
Mozilla » Firefox » Version: 102.12.0

cpe:2.3:a:mozilla:firefox:102.12.0
Mozilla » Firefox » Version: 102.13.0

cpe:2.3:a:mozilla:firefox:102.13.0
Mozilla » Firefox » Version: 102.14.0

cpe:2.3:a:mozilla:firefox:102.14.0
Mozilla » Firefox » Version: 102.15.0

cpe:2.3:a:mozilla:firefox:102.15.0
Mozilla » Firefox » Version: 102.15.1

cpe:2.3:a:mozilla:firefox:102.15.1
Mozilla » Firefox » Version: 102.2.0

cpe:2.3:a:mozilla:firefox:102.2.0
Mozilla » Firefox » Version: 102.3.0

cpe:2.3:a:mozilla:firefox:102.3.0
Mozilla » Firefox » Version: 102.4.0

cpe:2.3:a:mozilla:firefox:102.4.0
Mozilla » Firefox » Version: 102.5.0

cpe:2.3:a:mozilla:firefox:102.5.0
Mozilla » Firefox » Version: 102.6.0

cpe:2.3:a:mozilla:firefox:102.6.0
Mozilla » Firefox » Version: 102.7.0

cpe:2.3:a:mozilla:firefox:102.7.0
Mozilla » Firefox » Version: 102.8.0

cpe:2.3:a:mozilla:firefox:102.8.0
Mozilla » Firefox » Version: 102.9.0

cpe:2.3:a:mozilla:firefox:102.9.0
Mozilla » Firefox » Version: 103.0

cpe:2.3:a:mozilla:firefox:103.0
Mozilla » Firefox » Version: 103.0.1

cpe:2.3:a:mozilla:firefox:103.0.1
Mozilla » Firefox » Version: 103.0.2

cpe:2.3:a:mozilla:firefox:103.0.2
Mozilla » Firefox » Version: 104.0

cpe:2.3:a:mozilla:firefox:104.0
Mozilla » Firefox » Version: 104.0.1

cpe:2.3:a:mozilla:firefox:104.0.1
Mozilla » Firefox » Version: 104.0.2

cpe:2.3:a:mozilla:firefox:104.0.2
Mozilla » Firefox » Version: 105.0

cpe:2.3:a:mozilla:firefox:105.0
Mozilla » Firefox » Version: 105.0.1

cpe:2.3:a:mozilla:firefox:105.0.1
Mozilla » Firefox » Version: 105.0.2

cpe:2.3:a:mozilla:firefox:105.0.2
Mozilla » Firefox » Version: 105.0.3

cpe:2.3:a:mozilla:firefox:105.0.3
Mozilla » Firefox » Version: 106.0

cpe:2.3:a:mozilla:firefox:106.0
Mozilla » Firefox » Version: 106.0.1

cpe:2.3:a:mozilla:firefox:106.0.1
Mozilla » Firefox » Version: 106.0.2

cpe:2.3:a:mozilla:firefox:106.0.2
Mozilla » Firefox » Version: 106.0.3

cpe:2.3:a:mozilla:firefox:106.0.3
Mozilla » Firefox » Version: 106.0.4

cpe:2.3:a:mozilla:firefox:106.0.4
Mozilla » Firefox » Version: 106.0.5

cpe:2.3:a:mozilla:firefox:106.0.5
Mozilla » Firefox » Version: 107.0

cpe:2.3:a:mozilla:firefox:107.0
Mozilla » Firefox » Version: 107.0.1

cpe:2.3:a:mozilla:firefox:107.0.1
Mozilla » Firefox » Version: 108.0

cpe:2.3:a:mozilla:firefox:108.0
Mozilla » Firefox » Version: 108.0.1

cpe:2.3:a:mozilla:firefox:108.0.1
Mozilla » Firefox » Version: 108.0.2

cpe:2.3:a:mozilla:firefox:108.0.2
Mozilla » Firefox » Version: 109.0

cpe:2.3:a:mozilla:firefox:109.0
Mozilla » Firefox » Version: 109.0.1

cpe:2.3:a:mozilla:firefox:109.0.1
Mozilla » Firefox » Version: 110.0

cpe:2.3:a:mozilla:firefox:110.0
Mozilla » Firefox » Version: 110.0.1

cpe:2.3:a:mozilla:firefox:110.0.1
Mozilla » Firefox » Version: 111.0

cpe:2.3:a:mozilla:firefox:111.0
Mozilla » Firefox » Version: 111.0.1

cpe:2.3:a:mozilla:firefox:111.0.1
Mozilla » Firefox » Version: 112.0

cpe:2.3:a:mozilla:firefox:112.0
Mozilla » Firefox » Version: 112.0.1

cpe:2.3:a:mozilla:firefox:112.0.1
Mozilla » Firefox » Version: 112.0.2

cpe:2.3:a:mozilla:firefox:112.0.2
Mozilla » Firefox » Version: 113.0

cpe:2.3:a:mozilla:firefox:113.0
Mozilla » Firefox » Version: 113.0.1

cpe:2.3:a:mozilla:firefox:113.0.1
Mozilla » Firefox » Version: 113.0.2

cpe:2.3:a:mozilla:firefox:113.0.2
Mozilla » Firefox » Version: 114.0

cpe:2.3:a:mozilla:firefox:114.0
Mozilla » Firefox » Version: 114.0.1

cpe:2.3:a:mozilla:firefox:114.0.1
Mozilla » Firefox » Version: 114.0.2

cpe:2.3:a:mozilla:firefox:114.0.2
Mozilla » Firefox » Version: 115.0

cpe:2.3:a:mozilla:firefox:115.0
Mozilla » Firefox » Version: 115.0.1

cpe:2.3:a:mozilla:firefox:115.0.1
Mozilla » Firefox » Version: 115.0.2

cpe:2.3:a:mozilla:firefox:115.0.2
Mozilla » Firefox » Version: 115.0.3

cpe:2.3:a:mozilla:firefox:115.0.3
Mozilla » Firefox » Version: 115.1.0

cpe:2.3:a:mozilla:firefox:115.1.0
Mozilla » Firefox » Version: 115.2.0

cpe:2.3:a:mozilla:firefox:115.2.0
Mozilla » Firefox » Version: 115.2.1

cpe:2.3:a:mozilla:firefox:115.2.1
Mozilla » Firefox » Version: 116.0

cpe:2.3:a:mozilla:firefox:116.0
Mozilla » Firefox » Version: 116.0.1

cpe:2.3:a:mozilla:firefox:116.0.1
Mozilla » Firefox » Version: 116.0.2

cpe:2.3:a:mozilla:firefox:116.0.2
Mozilla » Firefox » Version: 116.0.3

cpe:2.3:a:mozilla:firefox:116.0.3
Mozilla » Firefox » Version: 117.0

cpe:2.3:a:mozilla:firefox:117.0
Mozilla » Firefox » Version: 117.0.1

cpe:2.3:a:mozilla:firefox:117.0.1
Mozilla » Firefox » Version: 118.0

cpe:2.3:a:mozilla:firefox:118.0
Mozilla » Firefox » Version: 118.0.1

cpe:2.3:a:mozilla:firefox:118.0.1
Mozilla » Firefox » Version: 118.0.2

cpe:2.3:a:mozilla:firefox:118.0.2
Mozilla » Firefox » Version: 119.0

cpe:2.3:a:mozilla:firefox:119.0
Mozilla » Firefox » Version: 119.0.1

cpe:2.3:a:mozilla:firefox:119.0.1
Mozilla » Firefox » Version: 120.0

cpe:2.3:a:mozilla:firefox:120.0
Mozilla » Firefox » Version: 120.0.1

cpe:2.3:a:mozilla:firefox:120.0.1
Mozilla » Firefox » Version: 121.0

cpe:2.3:a:mozilla:firefox:121.0
Mozilla » Firefox » Version: 121.0.1

cpe:2.3:a:mozilla:firefox:121.0.1
Mozilla » Firefox » Version: 122.0

cpe:2.3:a:mozilla:firefox:122.0
Mozilla » Firefox » Version: 122.0.1

cpe:2.3:a:mozilla:firefox:122.0.1
Mozilla » Firefox » Version: 123.0

cpe:2.3:a:mozilla:firefox:123.0
Mozilla » Firefox » Version: 123.0.1

cpe:2.3:a:mozilla:firefox:123.0.1
Mozilla » Firefox » Version: 124.0

cpe:2.3:a:mozilla:firefox:124.0
Mozilla » Firefox » Version: 124.0.1

cpe:2.3:a:mozilla:firefox:124.0.1
Mozilla » Firefox » Version: 124.0.2

cpe:2.3:a:mozilla:firefox:124.0.2
Mozilla » Firefox » Version: 125.0.1

cpe:2.3:a:mozilla:firefox:125.0.1
Mozilla » Firefox » Version: 125.0.2

cpe:2.3:a:mozilla:firefox:125.0.2
Mozilla » Firefox » Version: 125.0.3

cpe:2.3:a:mozilla:firefox:125.0.3
Mozilla » Firefox » Version: 126.0

cpe:2.3:a:mozilla:firefox:126.0
Mozilla » Firefox » Version: 126.0.1

cpe:2.3:a:mozilla:firefox:126.0.1
Mozilla » Firefox » Version: 127.0

cpe:2.3:a:mozilla:firefox:127.0
Mozilla » Firefox » Version: 127.0.1

cpe:2.3:a:mozilla:firefox:127.0.1
Mozilla » Firefox » Version: 127.0.2

cpe:2.3:a:mozilla:firefox:127.0.2
Mozilla » Firefox » Version: 128.0

cpe:2.3:a:mozilla:firefox:128.0
Mozilla » Firefox » Version: 128.0.2

cpe:2.3:a:mozilla:firefox:128.0.2
Mozilla » Firefox » Version: 128.0.3

cpe:2.3:a:mozilla:firefox:128.0.3
Mozilla » Firefox » Version: 128.1.0

cpe:2.3:a:mozilla:firefox:128.1.0
Mozilla » Firefox » Version: 129.0

cpe:2.3:a:mozilla:firefox:129.0
Mozilla » Firefox » Version: 129.0.1

cpe:2.3:a:mozilla:firefox:129.0.1
Mozilla » Firefox » Version: 129.0.2

cpe:2.3:a:mozilla:firefox:129.0.2
Mozilla » Firefox » Version: 130.0

cpe:2.3:a:mozilla:firefox:130.0
Mozilla » Firefox » Version: 130.0.1

cpe:2.3:a:mozilla:firefox:130.0.1
Mozilla » Firefox » Version: 131.0

cpe:2.3:a:mozilla:firefox:131.0
Mozilla » Firefox » Version: 131.0.2

cpe:2.3:a:mozilla:firefox:131.0.2
Mozilla » Firefox » Version: 131.0.3

cpe:2.3:a:mozilla:firefox:131.0.3
Mozilla » Firefox » Version: 136.0

cpe:2.3:a:mozilla:firefox:136.0
Mozilla » Firefox » Version: 141.0

cpe:2.3:a:mozilla:firefox:141.0
Mozilla » Firefox » Version: 142.0

cpe:2.3:a:mozilla:firefox:142.0
Mozilla » Firefox » Version: 143.0

cpe:2.3:a:mozilla:firefox:143.0
Mozilla » Firefox » Version: 143.0.3

cpe:2.3:a:mozilla:firefox:143.0.3
Mozilla » Firefox » Version: 144.0

cpe:2.3:a:mozilla:firefox:144.0
Mozilla » Firefox » Version: 144.0.2

cpe:2.3:a:mozilla:firefox:144.0.2
Mozilla » Firefox » Version: 145.0

cpe:2.3:a:mozilla:firefox:145.0
Mozilla » Firefox » Version: 146.0.1

cpe:2.3:a:mozilla:firefox:146.0.1
Mozilla » Firefox » Version: 147.0

cpe:2.3:a:mozilla:firefox:147.0
Mozilla » Firefox » Version: 147.0.2

cpe:2.3:a:mozilla:firefox:147.0.2
Mozilla » Firefox » Version: 148.0

cpe:2.3:a:mozilla:firefox:148.0
Mozilla » Firefox » Version: 148.0.2

cpe:2.3:a:mozilla:firefox:148.0.2
Mozilla » Firefox » Version: 149.0

cpe:2.3:a:mozilla:firefox:149.0
Mozilla » Firefox » Version: 149.0.1

cpe:2.3:a:mozilla:firefox:149.0.1
Mozilla » Firefox » Version: 149.0.2

cpe:2.3:a:mozilla:firefox:149.0.2
Mozilla » Firefox » Version: 17.0

cpe:2.3:a:mozilla:firefox:17.0
Mozilla » Firefox » Version: 17.0.1

cpe:2.3:a:mozilla:firefox:17.0.1
Mozilla » Firefox » Version: 24.0

cpe:2.3:a:mozilla:firefox:24.0
Mozilla » Firefox » Version: 31.0

cpe:2.3:a:mozilla:firefox:31.0
Mozilla » Firefox » Version: 38.0

cpe:2.3:a:mozilla:firefox:38.0
Mozilla » Firefox » Version: 38.0.1

cpe:2.3:a:mozilla:firefox:38.0.1
Mozilla » Firefox » Version: 38.0.5

cpe:2.3:a:mozilla:firefox:38.0.5
Mozilla » Firefox » Version: 39.0.3

cpe:2.3:a:mozilla:firefox:39.0.3
Mozilla » Firefox » Version: 45.0

cpe:2.3:a:mozilla:firefox:45.0
Mozilla » Firefox » Version: 45.0.1

cpe:2.3:a:mozilla:firefox:45.0.1
Mozilla » Firefox » Version: 50.0.1

cpe:2.3:a:mozilla:firefox:50.0.1
Mozilla » Firefox » Version: 50.0.2

cpe:2.3:a:mozilla:firefox:50.0.2
Mozilla » Firefox » Version: 50.1.0

cpe:2.3:a:mozilla:firefox:50.1.0
Mozilla » Firefox » Version: 52.0

cpe:2.3:a:mozilla:firefox:52.0
Mozilla » Firefox » Version: 53.0

cpe:2.3:a:mozilla:firefox:53.0
Mozilla » Firefox » Version: 60.0

cpe:2.3:a:mozilla:firefox:60.0
Mozilla » Firefox » Version: 60.0.1

cpe:2.3:a:mozilla:firefox:60.0.1
Mozilla » Firefox » Version: 60.0.2

cpe:2.3:a:mozilla:firefox:60.0.2
Mozilla » Firefox » Version: 67.0.1

cpe:2.3:a:mozilla:firefox:67.0.1
Mozilla » Firefox » Version: 67.0.3

cpe:2.3:a:mozilla:firefox:67.0.3
Mozilla » Firefox » Version: 67.0.4

cpe:2.3:a:mozilla:firefox:67.0.4
Mozilla » Firefox » Version: 68.0

cpe:2.3:a:mozilla:firefox:68.0
Mozilla » Firefox » Version: 68.0.1

cpe:2.3:a:mozilla:firefox:68.0.1
Mozilla » Firefox » Version: 68.0.2

cpe:2.3:a:mozilla:firefox:68.0.2
Mozilla » Firefox » Version: 72.0.1

cpe:2.3:a:mozilla:firefox:72.0.1
Mozilla » Firefox » Version: 74.0.1

cpe:2.3:a:mozilla:firefox:74.0.1
Mozilla » Firefox » Version: 78.0

cpe:2.3:a:mozilla:firefox:78.0
Mozilla » Firefox » Version: 78.0.1

cpe:2.3:a:mozilla:firefox:78.0.1
Mozilla » Firefox » Version: 78.0.2

cpe:2.3:a:mozilla:firefox:78.0.2
Mozilla » Firefox » Version: 80.0.1

cpe:2.3:a:mozilla:firefox:80.0.1
Mozilla » Firefox » Version: 81.0.1

cpe:2.3:a:mozilla:firefox:81.0.1
Mozilla » Firefox » Version: 81.0.2

cpe:2.3:a:mozilla:firefox:81.0.2
Mozilla » Firefox » Version: 82.0.1

cpe:2.3:a:mozilla:firefox:82.0.1
Mozilla » Firefox » Version: 82.0.2

cpe:2.3:a:mozilla:firefox:82.0.2
Mozilla » Firefox » Version: 82.0.3

cpe:2.3:a:mozilla:firefox:82.0.3
Mozilla » Firefox » Version: 83.0

cpe:2.3:a:mozilla:firefox:83.0
Mozilla » Firefox » Version: 84.0

cpe:2.3:a:mozilla:firefox:84.0
Mozilla » Firefox » Version: 84.0.1

cpe:2.3:a:mozilla:firefox:84.0.1
Mozilla » Firefox » Version: 84.0.2

cpe:2.3:a:mozilla:firefox:84.0.2
Mozilla » Firefox » Version: 85.0

cpe:2.3:a:mozilla:firefox:85.0
Mozilla » Firefox » Version: 85.0.1

cpe:2.3:a:mozilla:firefox:85.0.1
Mozilla » Firefox » Version: 85.0.2

cpe:2.3:a:mozilla:firefox:85.0.2
Mozilla » Firefox » Version: 86.0

cpe:2.3:a:mozilla:firefox:86.0
Mozilla » Firefox » Version: 86.0.1

cpe:2.3:a:mozilla:firefox:86.0.1
Mozilla » Firefox » Version: 87.0

cpe:2.3:a:mozilla:firefox:87.0
Mozilla » Firefox » Version: 88.0

cpe:2.3:a:mozilla:firefox:88.0
Mozilla » Firefox » Version: 88.0.1

cpe:2.3:a:mozilla:firefox:88.0.1
Mozilla » Firefox » Version: 89.0

cpe:2.3:a:mozilla:firefox:89.0
Mozilla » Firefox » Version: 89.0.1

cpe:2.3:a:mozilla:firefox:89.0.1
Mozilla » Firefox » Version: 89.0.2

cpe:2.3:a:mozilla:firefox:89.0.2
Mozilla » Firefox » Version: 90.0

cpe:2.3:a:mozilla:firefox:90.0
Mozilla » Firefox » Version: 90.0.1

cpe:2.3:a:mozilla:firefox:90.0.1
Mozilla » Firefox » Version: 90.0.2

cpe:2.3:a:mozilla:firefox:90.0.2
Mozilla » Firefox » Version: 91.0

cpe:2.3:a:mozilla:firefox:91.0
Mozilla » Firefox » Version: 91.0.1

cpe:2.3:a:mozilla:firefox:91.0.1
Mozilla » Firefox » Version: 91.0.2

cpe:2.3:a:mozilla:firefox:91.0.2
Mozilla » Firefox » Version: 92.0.1

cpe:2.3:a:mozilla:firefox:92.0.1
Mozilla » Firefox » Version: 93.0

cpe:2.3:a:mozilla:firefox:93.0
Mozilla » Firefox » Version: 94.0

cpe:2.3:a:mozilla:firefox:94.0
Mozilla » Firefox » Version: 94.0.1

cpe:2.3:a:mozilla:firefox:94.0.1
Mozilla » Firefox » Version: 94.0.2

cpe:2.3:a:mozilla:firefox:94.0.2
Mozilla » Firefox » Version: 95.0

cpe:2.3:a:mozilla:firefox:95.0
Mozilla » Firefox » Version: 95.0.1

cpe:2.3:a:mozilla:firefox:95.0.1
Mozilla » Firefox » Version: 95.0.2

cpe:2.3:a:mozilla:firefox:95.0.2
Mozilla » Firefox » Version: 96.0

cpe:2.3:a:mozilla:firefox:96.0
Mozilla » Firefox » Version: 96.0.1

cpe:2.3:a:mozilla:firefox:96.0.1
Mozilla » Firefox » Version: 96.0.2

cpe:2.3:a:mozilla:firefox:96.0.2
Mozilla » Firefox » Version: 96.0.3

cpe:2.3:a:mozilla:firefox:96.0.3
Mozilla » Firefox » Version: 97.0

cpe:2.3:a:mozilla:firefox:97.0
Mozilla » Firefox » Version: 97.0.1

cpe:2.3:a:mozilla:firefox:97.0.1
Mozilla » Firefox » Version: 97.0.2

cpe:2.3:a:mozilla:firefox:97.0.2
Mozilla » Firefox » Version: 98.0

cpe:2.3:a:mozilla:firefox:98.0
Mozilla » Firefox » Version: 98.0.1

cpe:2.3:a:mozilla:firefox:98.0.1
Mozilla » Firefox » Version: 98.0.2

cpe:2.3:a:mozilla:firefox:98.0.2
Mozilla » Firefox » Version: 99.0

cpe:2.3:a:mozilla:firefox:99.0
Mozilla » Firefox » Version: 99.0.1

cpe:2.3:a:mozilla:firefox:99.0.1
Mozilla » Thunderbird » Version: N/A

cpe:2.3:a:mozilla:thunderbird:-
Mozilla » Thunderbird » Version: 135.0

cpe:2.3:a:mozilla:thunderbird:135.0
Mozilla » Thunderbird » Version: 139.0

cpe:2.3:a:mozilla:thunderbird:139.0
Mozilla » Thunderbird » Version: 140.0.1

cpe:2.3:a:mozilla:thunderbird:140.0.1
Mozilla » Thunderbird » Version: 141.0

cpe:2.3:a:mozilla:thunderbird:141.0
Mozilla » Thunderbird » Version: 142.0

cpe:2.3:a:mozilla:thunderbird:142.0
Mozilla » Thunderbird » Version: 143.0

cpe:2.3:a:mozilla:thunderbird:143.0
Mozilla » Thunderbird » Version: 143.0.1

cpe:2.3:a:mozilla:thunderbird:143.0.1
Mozilla » Thunderbird » Version: 144.0

cpe:2.3:a:mozilla:thunderbird:144.0
Mozilla » Thunderbird » Version: 144.0.1

cpe:2.3:a:mozilla:thunderbird:144.0.1
Mozilla » Thunderbird » Version: 145.0

cpe:2.3:a:mozilla:thunderbird:145.0
Mozilla » Thunderbird » Version: 146.0

cpe:2.3:a:mozilla:thunderbird:146.0
Mozilla » Thunderbird » Version: 146.0.1

cpe:2.3:a:mozilla:thunderbird:146.0.1
Mozilla » Thunderbird » Version: 147.0

cpe:2.3:a:mozilla:thunderbird:147.0
Mozilla » Thunderbird » Version: 148.0.1

cpe:2.3:a:mozilla:thunderbird:148.0.1
Mozilla » Thunderbird » Version: 149.0

cpe:2.3:a:mozilla:thunderbird:149.0
Mozilla » Thunderbird » Version: 149.0.2

cpe:2.3:a:mozilla:thunderbird:149.0.2

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-6755

Products

Pricing

Contact Us