CVE-2024-1554
CWE-345Published: February 20, 2024· Updated: Jun 17, 2026
Official Description
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.
Risk Analysis
Firefox is vulnerable to cache poisoning because the browser incorrectly shares cache entries between fetch API calls and standard navigation. An attacker can manipulate the local cache to serve malicious content to users, warranting a critical severity rating.
No public exploit is known, and it is not in the KEV database. The flaw is remotely exploitable with low attack complexity.
Update Firefox to version 123 or later to ensure proper cache key isolation.
Technical Analysis
CVE-2024-1554 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-345)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2024-1554 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts