CVE-2026-8964 (GCVE-0-2026-8964)

Vulnerability from cvelistv5 – Published: 2026-05-19 12:30 – Updated: 2026-05-19 17:10
VLAI
Title
Spoofing issue in the Popup Blocker component
Summary
Spoofing issue in the Popup Blocker component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
Impacted products
Vendor Product Version
Mozilla Firefox Unaffected: 151 , ≤ * (rpm)
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Mozilla Thunderbird Unaffected: 151 , ≤ * (rpm)
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Credits
Satoki Tsuji
Show details on NVD website
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.