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CVE PROGRAM SOURCE RECORD5.4 Medium

CVE-2026-74963

Same-origin policy bypass in the Networking: Cookies component

Description

Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mozilla Firefox

  • 140.14 to ≤ 140.*unaffected
  • 153.1 to ≤ 153.*unaffected
  • 154 to ≤ *unaffected

Mozilla Thunderbird

  • 140.14 to ≤ 140.*unaffected
  • 153.1 to ≤ 153.*unaffected
  • 154 to ≤ *unaffected

References