| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 131.0 | 131.0 |
| firefox esr | ≥ 116.0, < 128.3.0< 115.16.0 | 128.3.0115.16.0 |
| thunderbird | = 129.0< 128.3 | 128.3 |
An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://pdf.js` origin. This could allow them to access cross-origin PDF content. This access is limited to "same site" documents by the Site Isolation feature on desktop clients, but full cross-origin access is possible on Android versions. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.
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