ZeroDay Findings
Sign inSign up

Findings

CVE-2021-30633

Google Chromium Indexed DB API Use-After-Free Vulnerability

Published Oct 8, 2021 · updated Jun 16, 2026 · google chrome

Google Chromium Indexed DB API contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 8, 2021 · Catalog

    Detected

    Google Chromium Indexed DB API contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Nov 17, 2021 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Google Chromium Indexed DB API contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Required action

Apply updates per vendor instructions.

CISA due date Nov 17, 2021

Affected

  • cpe fedoraproject/fedora33
  • cpe fedoraproject/fedora35
  • cpe google/chromeversion unspecified
  • vendor Google Chromium Indexed DB APIversion unspecified

Sources

  • CISA KEVCVE-2021-30633

    Google Chromium Indexed DB API contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

    cisa.gov
  • CVE.orgCVE-2021-30633

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2021-30633

    30-day exploitation probability 33.2%

    first.org
  • NIST NVDCVE-2021-30633

    Use after free in Indexed DB API in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

    nvd.nist.gov

References