Out-of-bounds Read Affecting bellard/quickjs package, versions [,2025.09.13)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-BELLARDQUICKJS-13610917
- published17 Oct 2025
- disclosed16 Oct 2025
- creditUnknown
Introduced: 16 Oct 2025
NewCVE-2025-62493 (opens in a new tab)How to fix?
Upgrade bellard/quickjs to version 2025.09.13 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read via the js_bigint_to_string1() function. An attacker can access sensitive information from adjacent heap memory by triggering a crafted BigInt conversion that causes the engine to read beyond the allocated buffer.