FKIE_CVE-2026-2798

Vulnerability from fkie_nvd - Published: 2026-02-24 14:16 - Updated: 2026-02-25 15:39
Severity ?
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
Use-after-free in the DOM: Core & HTML component. This vulnerability affects Firefox < 148 and Thunderbird < 148.
References
security@mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=2014136Permissions Required
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-13/Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2026-16/Vendor Advisory
Impacted products
Vendor Product Version
mozilla firefox *
mozilla thunderbird *
To clipboard 

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    {
      "nodes": [
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          "cpeMatch": [
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              "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*",
              "matchCriteriaId": "3D8676DB-4A12-41A0-A1A5-2DED97287973",
              "versionEndExcluding": "148.0",
              "vulnerable": true
            },
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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "Use-after-free in the DOM: Core \u0026 HTML component. This vulnerability affects Firefox \u003c 148 and Thunderbird \u003c 148."
    }
  ],
  "id": "CVE-2026-2798",
  "lastModified": "2026-02-25T15:39:23.923",
  "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,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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  "published": "2026-02-24T14:16:28.307",
  "references": [
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      "tags": [
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2014136"
    },
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          "value": "CWE-416"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
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}


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  • 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.
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  • 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.



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