CVE-2023-4055 Other in Firefox

What is CVE-2023-4055?

CVE-2023-4055 is a high-severity vulnerability in Debian Debian Linux, published on 1 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

When the number of cookies per domain was exceeded in `document.cookie`, the actual cookie jar sent to the host was no longer consistent with expected cookie jar state. This could have caused requests to be sent with some cookies missing. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

Weakness: CWE-120

Which versions are affected by CVE-2023-4055?

It affects 2 products.

Products include Debian Debian Linux, Mozilla Firefox.

How do I fix CVE-2023-4055?

Upgrade to a fixed version.

Is CVE-2023-4055 being exploited?

There is no known exploitation of CVE-2023-4055 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2023-4055, GHSA-38vw-jr6f-3c23, UBUNTU-CVE-2023-4055.