| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 128.5.0< 133.0 | 128.5.0133.0 |
| thunderbird | ≥ 129.0, < 133.0< 128.5.0 | 133.0128.5.0 |
The application failed to account for exceptions thrown by the `loadManifestFromFile` method during add-on signature verification. This flaw, triggered by an invalid or unsupported extension manifest, could have caused runtime errors that disrupted the signature validation process. As a result, the enforcement of signature validation for unrelated add-ons may have been bypassed. Signature validation in this context is used to ensure that third-party applications on the user's computer have not tampered with the user's extensions, limiting the impact of this issue. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.
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