What’s Vulnerable › Vulnerabilities

CVE-2025-47154

• Severity: critical (CVSS 9.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-01 · updated 2026-06-17
• Weakness: CWE-820

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."

References

• https://github.com/LadybirdBrowser/ladybird/commit/f5a670421954fc7130c3685b713c621b29516669
• https://jessie.cafe/posts/pwning-ladybirds-libjs/
• https://news.ycombinator.com/item?id=43852096
• https://jessie.cafe/posts/pwning-ladybirds-libjs/

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