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    CVE-2026-71573

    Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper implementation prevented configured CORS origins from being properly validated in CORS requests.

    Published:Aug 18, 2026
    Last Modified:Sep 3, 2026
    EPS:Aug 18, 2026
    EPSS Score:0.00336
    CVSS Score:8.3

    Affected Products

    Vendor
    Joomla
    Product
    Joomla!
    Vendor
    Joomla
    Product
    Joomla\!

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-15 Command Delimiters
    CAPEC-81 Web Server Logs Tampering

    Related CVEs

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    CVE-2026-73372 (CVSS 5.1) — Joomla! Core - [20260809] - Improper ACL checks when injection schema.org contact data in Joomla 5.1.0-5.4.7 a…
    CVE-2026-71572 (CVSS 4.8) — Joomla! Core - [20260801] - Response header injection in download views in Joomla 3.0.0-5.4.7, 6.0.0-6.1.2 - L…
    CVE-2026-73337 (CVSS 8.2) — Joomla! Core - [20260807] - MFA Authentication Bypass in Joomla 4.0.0-5.4.7 and 6.0.0-6.1.2 - Insufficient sta…
    CVE-2026-73371 (CVSS 5.1) — Joomla! Core - [20260808] - Improper ACL checks for batch copy actions in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An…
    CVE-2026-72532 (CVSS 5.1) — Joomla! Core - [20260806] - Improper ACL checks for category webservice endpoints in Joomla 4.0.0-5.4.7, 6.0.0…
    CVE-2026-73373 (CVSS 8.9) — Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The defau…
    CVE-2026-71574 (CVSS 8.5) — Joomla! Core - [20260803] - Inconsistent ACL checks for mutating webservice endpoints in Joomla 4.0.0-5.4.7, 6…
    CVE-2026-73327 — This CVE ID has been rejected or withdrawn by its CVE Numbering Authority as the reported behavior is intentio…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High