Mozilla: >> Firefox >> 115.26.0 Security Vulnerabilities
When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `<embed>` or `<object>` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.
CVSS Score
6.1
EPSS Score
0.001
Published
2025-06-24
An integer overflow was present in `OrderedHashTable` used by the JavaScript engine This vulnerability affects Firefox < 139.0.4.
CVSS Score
9.8
EPSS Score
0.001
Published
2025-06-11
Certain canvas operations could have lead to memory corruption. This vulnerability affects Firefox < 139.0.4.
CVSS Score
9.8
EPSS Score
0.001
Published
2025-06-11
Memory safety bugs present in Firefox 138 and Thunderbird 138. 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 affects Firefox < 139 and Thunderbird < 139.
CVSS Score
7.3
EPSS Score
0.001
Published
2025-05-27
Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.
CVSS Score
4.3
EPSS Score
0.001
Published
2025-05-27
A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.
CVSS Score
5.4
EPSS Score
0.001
Published
2025-05-27
Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. 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 affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.
CVSS Score
8.1
EPSS Score
0.001
Published
2025-05-27
Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 128.11 and Thunderbird < 128.11.
CVSS Score
8.1
EPSS Score
0.001
Published
2025-05-27
In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability affects Firefox < 139 and Thunderbird < 139.
CVSS Score
7.5
EPSS Score
0.0
Published
2025-05-27
Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability affects Firefox < 139 and Thunderbird < 139.
CVSS Score
6.5
EPSS Score
0.001
Published
2025-05-27