CVE-2026-100788 (GCVE-0-2026-100788)

Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-09-30 17:20
VLAI
Title
Invalid pointer in the JavaScript: WebAssembly component
Summary
Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Mozilla Thunderbird Unaffected: 140.17 , ≤ 140.* (rpm)
Unaffected: 153.4 , ≤ 153.* (rpm)
Unaffected: 157 , ≤ * (rpm)
guessed Create a notification for this product.
Mozilla Firefox Unaffected: 140.17 , ≤ 140.* (rpm)
Unaffected: 153.4 , ≤ 153.* (rpm)
Unaffected: 157 , ≤ * (rpm)
guessed Create a notification for this product.
Credits
Mozilla
Show details on NVD website
To clipboard 

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          "versions": [
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            },
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              "versionType": "rpm"
            },
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            }
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          "value": "Mozilla"
        }
      ],
      "descriptions": [
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          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17."
            }
          ],
          "value": "Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-30T17:20:29.498Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2072413"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-100/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-101/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-102/"
        },
        {
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        },
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        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-99/"
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      ],
      "title": "Invalid pointer in the JavaScript: WebAssembly component"
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    "cveId": "CVE-2026-100788",
    "datePublished": "2026-09-29T12:36:11.268Z",
    "dateReserved": "2026-09-26T19:17:13.330Z",
    "dateUpdated": "2026-09-30T17:20:29.498Z",
    "state": "PUBLISHED"
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      "percentile": "0.03692"
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    "nvd": {
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                "product": "Thunderbird",
                "vendor": "Mozilla",
                "versions": [
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              },
              {
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                    "version": "140.17",
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                  {
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                    "version": "153.4",
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          }
        ],
        "id": "CVE-2026-100788",
        "lastModified": "2026-09-30T18:18:07.423",
        "metrics": {},
        "published": "2026-09-29T13:17:43.817",
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          {
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          },
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            "url": "https://www.mozilla.org/security/advisories/mfsa2026-103/"
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            "url": "https://www.mozilla.org/security/advisories/mfsa2026-97/"
          },
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            "source": "security@mozilla.org",
            "url": "https://www.mozilla.org/security/advisories/mfsa2026-99/"
          }
        ],
        "sourceIdentifier": "security@mozilla.org",
        "vulnStatus": "Awaiting Analysis"
      }
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-29T23:41:51Z",
      "cve": "CVE-2026-100788",
      "id": "CVE-2026-100788",
      "initial_release_date": "2026-09-29T23:41:51Z",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-100788",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-100788.json",
      "version": "2"
    }
  }
}



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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.



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