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CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-100803

Same-origin policy bypass in the WebExtensions component

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
mozilla

Description

Same-origin policy bypass in the WebExtensions component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

Affected products

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

Mozilla Firefox

  • 115.42 to ≤ 115.*unaffected
  • 140.17 to ≤ 140.*unaffected
  • 153.4 to ≤ 153.*unaffected
  • 157 to ≤ *unaffected

Mozilla Thunderbird

  • 140.17 to ≤ 140.*unaffected
  • 153.4 to ≤ 153.*unaffected
  • 157 to ≤ *unaffected

References