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CVE-2026-85045 — Proof-of-concept trigger for CVE-2026-85045, a Chrome V8 Maglev deoptimization bug causing incorrect array output on vulnerable builds. | Kitploit
Tools/GitHubGitHub/sneakynachos/cve-2026-85045
Vulnerability AnalysisExploitationBinary Exploitation
GitHubsneakynachos/cve-2026-85045

CVE-2026-85045

Proof-of-concept trigger for CVE-2026-85045, a Chrome V8 Maglev deoptimization bug causing incorrect array output on vulnerable builds.

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112420 days agoNot yet reviewed

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CVE-2026-85045

A training poc I cooked up while going after the larger chains.

Maglev reuses one mutable HeapNumber while materializing recursive deoptimization frames. The exact upstream trigger produces [0,3,3,3] on both 148 builds and 152.0.7977.75, versus [0,1,2,3] on fixed 152.0.7977.82.

Load poc.js as a page script with --js-flags="--allow-natives-syntax --maglev".

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