CVE-2026-2771 (GCVE-0-2026-2771)

Vulnerability from cvelistv5 – Published: 2026-02-24 13:33 – Updated: 2026-02-24 13:33
VLAI?
Title
Undefined behavior in the DOM: Core & HTML component
Summary
Undefined behavior in the DOM: Core & HTML component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Mozilla Firefox Affected: unspecified , < 148 (custom)
Create a notification for this product.
    Mozilla Firefox ESR Affected: unspecified , < 115.33 (custom)
Create a notification for this product.
    Mozilla Firefox ESR Affected: unspecified , < 140.8 (custom)
Create a notification for this product.
Credits
Information to follow
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "148",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Firefox ESR",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "115.33",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Firefox ESR",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThan": "140.8",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Information to follow"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Undefined behavior in the DOM: Core \u0026 HTML component. This vulnerability affects Firefox \u003c 148, Firefox ESR \u003c 115.33, and Firefox ESR \u003c 140.8."
            }
          ],
          "value": "Undefined behavior in the DOM: Core \u0026 HTML component. This vulnerability affects Firefox \u003c 148, Firefox ESR \u003c 115.33, and Firefox ESR \u003c 140.8."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-24T13:33:08.538Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2014593"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-13/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-14/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-15/"
        }
      ],
      "title": "Undefined behavior in the DOM: Core \u0026 HTML component"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2026-2771",
    "datePublished": "2026-02-24T13:33:08.538Z",
    "dateReserved": "2026-02-19T15:05:48.804Z",
    "dateUpdated": "2026-02-24T13:33:08.538Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-2771\",\"sourceIdentifier\":\"security@mozilla.org\",\"published\":\"2026-02-24T14:16:25.497\",\"lastModified\":\"2026-02-24T14:16:25.497\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Undefined behavior in the DOM: Core \u0026 HTML component. This vulnerability affects Firefox \u003c 148, Firefox ESR \u003c 115.33, and Firefox ESR \u003c 140.8.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://bugzilla.mozilla.org/show_bug.cgi?id=2014593\",\"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\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.