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    CVE-2026-87505

    Incorrect authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted PDF file. (Chromium security severity: Medium)

    Published:Sep 9, 2026
    Last Modified:Sep 10, 2026
    EPS:Sep 9, 2026
    EPSS Score:0.00164
    CVSS Score:8.1

    Affected Products

    Vendor
    Google
    Product
    Chrome

    Exploits

    https://issues.chromium.org/issues/517597701

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-87544 (CVSS 9.8) — Incorrect authorization in Extensions in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to byp…
    CVE-2026-87601 (CVSS 7.5) — Race condition in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary co…
    CVE-2026-87602 (CVSS 4.7) — Out of bounds read in ANGLE in Google Chrome on on Windows prior to 153.0.8010.36 allowed a remote attacker to…
    CVE-2026-87437 (CVSS 6.5) — Information leak in Frames in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to leak sensitive…
    CVE-2026-87608 — Improper certificate validation in FedCM in Google Chrome prior to 153.0.8010.36 allowed a remote attacker lev…
    CVE-2026-87551 (CVSS 4.3) — Improper certificate validation in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leve…
    CVE-2026-87477 (CVSS 6.5) — Information leak in Core in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to leak sensitive i…
    CVE-2026-87571 (CVSS 5.4) — Improper certificate validation in Loader in Google Chrome prior to 153.0.8010.36 allowed a remote attacker le…

    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
    CVE-2026-87505 — Google (High 8.1) | CVE-DB