FKIE_CVE-2026-8970

Vulnerability from fkie_nvd - Published: 2026-05-19 14:16 - Updated: 2026-05-20 17:34
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
References
security@mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=2032174Permissions Required
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-46/Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-48/Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-50/Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-51/Vendor Advisory
Impacted products
Vendor Product Version
mozilla firefox *
mozilla firefox *
mozilla thunderbird *
mozilla thunderbird *
To clipboard 

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    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*",
              "matchCriteriaId": "51216802-B743-4D96-9262-A4B0ECB71A0E",
              "versionEndExcluding": "140.11.0",
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            },
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11."
    }
  ],
  "id": "CVE-2026-8970",
  "lastModified": "2026-05-20T17:34:49.203",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "impactScore": 5.9,
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        "type": "Secondary"
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  "published": "2026-05-19T14:16:53.500",
  "references": [
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      "tags": [
        "Permissions Required"
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2032174"
    },
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  "sourceIdentifier": "security@mozilla.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-269"
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      "type": "Secondary"
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}


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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

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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.