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CVE-2025-62492VulnerabilityPublished Updated

A vulnerability stemming from floating-point arithmetic precision errors exists in the QuickJS engine's implementation

Source GCVE Database

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Not known to be exploited · CVSS 6.5 Medium.

Data as of 29 Oct 2026, 23:15 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Oct 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

AI-suggested

Until a fix is released, avoid using untrusted input for the fromIndex argument in TypedArray.prototype.indexOf() or apply input validation to prevent extremely small negative values.

Description

A floating-point precision error in QuickJS's TypedArray.prototype.indexOf() allows an out-of-bounds read of one element past the end of an array when a very small negative fromIndex is used. This can lead to potential information disclosure of adjacent memory contents.

References

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