Not rated
CVE-2020-26973 Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed
Description
Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 84 | earliest → < 84 | 84 |
| Thunderbird 78.6 | earliest → < 78.6 | 78.6 |
| Firefox ESR 78.6 | earliest → < 78.6 | 78.6 |
Other CVEs of Firefox
The 2221 CVEs of Firefox →
CVE-2026-120572
Incorrect boundary conditions in the Layout: Block and Inline component
8.8
High
CVE-2026-118027
Frame poisoning in the Layout component
9.1
Critical
CVE-2026-118026
Invalid pointer in the JavaScript: GC component
8.8
High
CVE-2026-118024
Use-after-free in the Graphics: Text component
8.8
High