CVE-2025-47154 – Ladybird LibJS Use-After-Free Remote Code Execution Vulnerability

The following table lists the changes that have been made to the
CVE-2025-47154 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    May. 01, 2025

    Action Type Old Value New Value
    Added Tag disputed
    Added Description LibJS in Ladybird before f5a6704 mishandles the freeing of the vector that arguments_list references, leading to a use-after-free, and allowing remote attackers to execute arbitrary code via a crafted .js file. NOTE: the GitHub README says “Ladybird is in a pre-alpha state, and only suitable for use by developers.”
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
    Added CWE CWE-820
    Added Reference https://github.com/LadybirdBrowser/ladybird/commit/f5a670421954fc7130c3685b713c621b29516669
    Added Reference https://jessie.cafe/posts/pwning-ladybirds-libjs/
    Added Reference https://news.ycombinator.com/item?id=43852096
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