Vulnerability Details CVE-2025-62490
In quickjs, in js_print_object, when printing an array, the function first fetches the array length and then loops over it. The issue is, printing a value is not side-effect free. An attacker-defined callback could run during js_print_value, during which the array could get resized and len1 become out of bounds. This results in a use-after-free.A second instance occurs in the same function during printing of a map or set objects. The code iterates over ms->records list, but once again, elements could be removed from the list during js_print_value call.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 4.1%
CVSS Severity
CVSS v3 Score 8.8
Products affected by CVE-2025-62490
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cpe:2.3:a:quickjs_project:quickjs:-
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cpe:2.3:a:quickjs_project:quickjs:2019-07-09
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cpe:2.3:a:quickjs_project:quickjs:2019-07-21
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cpe:2.3:a:quickjs_project:quickjs:2019-07-28
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cpe:2.3:a:quickjs_project:quickjs:2019-08-10
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cpe:2.3:a:quickjs_project:quickjs:2019-08-18
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cpe:2.3:a:quickjs_project:quickjs:2019-09-01
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cpe:2.3:a:quickjs_project:quickjs:2019-09-18
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cpe:2.3:a:quickjs_project:quickjs:2019-10-27
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cpe:2.3:a:quickjs_project:quickjs:2019-12-21
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cpe:2.3:a:quickjs_project:quickjs:2020-01-05
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cpe:2.3:a:quickjs_project:quickjs:2020-01-19
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cpe:2.3:a:quickjs_project:quickjs:2020-03-16
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cpe:2.3:a:quickjs_project:quickjs:2020-04-12
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cpe:2.3:a:quickjs_project:quickjs:2020-07-05
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cpe:2.3:a:quickjs_project:quickjs:2020-09-06
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cpe:2.3:a:quickjs_project:quickjs:2020-11-08
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cpe:2.3:a:quickjs_project:quickjs:2021-03-27
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cpe:2.3:a:quickjs_project:quickjs:2022-03-06
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cpe:2.3:a:quickjs_project:quickjs:2023-12-09
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cpe:2.3:a:quickjs_project:quickjs:2024-01-13