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Home/CWEs/A01:2021
OWASP Top 10 Category

A01:2021: Broken Access Control

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Failures in enforcing what authenticated users are allowed to do — the most common web application risk. Includes missing authorization, privilege escalation, IDOR, and CORS misconfiguration.

Abstraction
Category
OWASP Top 10
A01:2021 (#1)
Related CVEs
27

▪ Weakness classes in this category

CWE-22CWE-862CWE-863CWE-285CWE-269CWE-601CWE-352CWE-59CWE-732CWE-284

▪ References & documentation

https://owasp.org/Top10/OWASP A01:2021 categoryOWASP Cheat Sheet Series

▪ Related CVEs

CVE-2023-22946Medium

Security vulnerability in spark

CVE-2023-22946Medium

Security vulnerability in spark

CVE-2023-22946Medium

Security vulnerability in spark

CVE-2022-35921Low

Security vulnerability in byobu

CVE-2026-45623High

Security vulnerability in postcss

CVE-2026-69153Medium

Security vulnerability in postcss

CVE-2026-27606Critical

Security vulnerability in rollup

CVE-2026-27606Critical

Security vulnerability in rollup

CVE-2026-69153Medium

Security vulnerability in postcss

CVE-2018-6914High

Security vulnerability in ruby

CVE-2018-8780Critical

Security vulnerability in ruby

CVE-2021-28966High

Security vulnerability in ruby

CVE-2008-1891Medium

Security vulnerability in ruby

CVE-2026-6321High

Security vulnerability in fast-uri

CVE-2026-45623High

Security vulnerability in postcss

CVE-2026-14620Medium

Security vulnerability in webpack-dev-server

CVE-2026-69153Medium

Security vulnerability in postcss

CVE-2021-31926Medium

Security vulnerability in amp

CVE-2026-69153Medium

Security vulnerability in postcss

CVE-2026-69153Medium

Security vulnerability in postcss

CVE-2026-53571High

Security vulnerability in vite

CVE-2025-46565Medium

Security vulnerability in vite

CVE-2026-45623High

Security vulnerability in postcss

CVE-2025-58751Medium

Security vulnerability in vite

CVE-2026-27606Critical

Security vulnerability in rollup

CVE-2026-53571High

Security vulnerability in vite

CVE-2025-58460Medium

Security vulnerability in opentelemetry