CWE-462: Duplicate Key in Associative List (Alist)

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Duplicate keys in associative lists can lead to non-unique keys being mistaken for an error.

What the weakness is: CWE-462 at MITRE. All weaknesses

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Explain CWE-462: Duplicate Key in Associative List (Alist) and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/462.html and https://cve.bz/cve/cwe/462?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this weakness's id and public links.

2.1CVE-2025-21085EPSS 0.3%2025-06-15
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