FKIE_CVE-2026-2776

Vulnerability from fkie_nvd - Published: 2026-02-24 14:16 - Updated: 2026-02-24 21:52
Severity ?
Summary
Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
References
security@mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=2015266
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-13/
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-14/
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-15/
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-16/
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-17/
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability affects Firefox \u003c 148, Firefox ESR \u003c 115.33, Firefox ESR \u003c 140.8, Thunderbird \u003c 148, and Thunderbird \u003c 140.8."
    }
  ],
  "id": "CVE-2026-2776",
  "lastModified": "2026-02-24T21:52:01.367",
  "metrics": {},
  "published": "2026-02-24T14:16:26.023",
  "references": [
    {
      "source": "security@mozilla.org",
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2015266"
    },
    {
      "source": "security@mozilla.org",
      "url": "https://www.mozilla.org/security/advisories/mfsa2026-13/"
    },
    {
      "source": "security@mozilla.org",
      "url": "https://www.mozilla.org/security/advisories/mfsa2026-14/"
    },
    {
      "source": "security@mozilla.org",
      "url": "https://www.mozilla.org/security/advisories/mfsa2026-15/"
    },
    {
      "source": "security@mozilla.org",
      "url": "https://www.mozilla.org/security/advisories/mfsa2026-16/"
    },
    {
      "source": "security@mozilla.org",
      "url": "https://www.mozilla.org/security/advisories/mfsa2026-17/"
    }
  ],
  "sourceIdentifier": "security@mozilla.org",
  "vulnStatus": "Awaiting Analysis"
}


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Sightings

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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.