The `fetch()` API and navigation incorrectly shared the same cache, as the cache key did not include the optional headers `fetch()` may contain. Under the correct circumstances, an attacker may have been able to poison the local browser cache by priming it with a `fetch()` response controlled by the additional headers. Upon navigation to the same URL, the user would see the cached response instead of the expected response. This vulnerability affects Firefox < 123.
The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
| Link | Tags |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1816390 | issue tracking exploit |
| https://www.mozilla.org/security/advisories/mfsa2024-05/ | vendor advisory |