Critical severity9.0NVD Advisory· Published May 1, 2025· Updated Apr 15, 2026

CVE-2025-47154

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."

Patches

f5a670421954

https://github.com/ladybirdbrowser/ladybirdvia osv

Vulnerability mechanics

Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

github.com/LadybirdBrowser/ladybird/commit/f5a670421954fc7130c3685b713c621b29516669nvd
jessie.cafe/posts/pwning-ladybirds-libjs/nvd
news.ycombinator.com/itemnvd

News mentions

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cvss	0.585
epss	0.001
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000