What’s Vulnerable › Vulnerabilities

CVE-2024-1554

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-02-20 · updated 2026-06-17
• Weakness: CWE-345

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.

Affected products

• Mozilla Firefox: before 123.0 — fixed in 123.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 123.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1816390
• https://www.mozilla.org/security/advisories/mfsa2024-05/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1816390
• https://www.mozilla.org/security/advisories/mfsa2024-05/

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