CVE-2025-47154CRITICAL 9.0EPSS p43.4%

CVE-2025-47154CVE-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."

Scoring

CVSS 3.19.0 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS0.59% probability of exploitation · percentile 43.4% · 2026-06-19T12:03:05Z
Published2025-05-01
Last modified2026-04-15

Underlying weaknesses· 1

CWE-820

References

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

1

TypeTargetConfidenceTier
WeaknessMissing Synchronizationcwe-8200%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-4723
CVE
CVE-2025-14861
CVE
CVE-2026-4701
CVE
CVE-2026-2763
CVE
CVE-2026-7356
CVE
CVE-2025-14860
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.