CVE-2026-100792 (GCVE-0-2026-100792)

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

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "Firefox",
          "vendor": "Mozilla",
          "versions": [
            {
              "lessThanOrEqual": "140.*",
              "status": "unaffected",
              "version": "140.17",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "153.*",
              "status": "unaffected",
              "version": "153.4",
              "versionType": "rpm"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "157",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Amy Burnett of OpenAI"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17."
            }
          ],
          "value": "JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-29T12:36:13.478Z",
        "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "shortName": "mozilla"
      },
      "references": [
        {
          "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2073266"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-100/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-97/"
        },
        {
          "url": "https://www.mozilla.org/security/advisories/mfsa2026-99/"
        }
      ],
      "title": "JIT miscompilation in the JavaScript: WebAssembly component"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
    "assignerShortName": "mozilla",
    "cveId": "CVE-2026-100792",
    "datePublished": "2026-09-29T12:36:13.478Z",
    "dateReserved": "2026-09-26T19:17:23.406Z",
    "dateUpdated": "2026-09-29T12:36:13.478Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-100792",
      "date": "2026-09-30",
      "epss": "0.00152",
      "percentile": "0.03692"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "Firefox",
                "vendor": "Mozilla",
                "versions": [
                  {
                    "lessThanOrEqual": "140.*",
                    "status": "unaffected",
                    "version": "140.17",
                    "versionType": "rpm"
                  },
                  {
                    "lessThanOrEqual": "153.*",
                    "status": "unaffected",
                    "version": "153.4",
                    "versionType": "rpm"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "157",
                    "versionType": "rpm"
                  }
                ]
              }
            ],
            "source": "security@mozilla.org"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17."
          }
        ],
        "id": "CVE-2026-100792",
        "lastModified": "2026-09-29T21:27:41.130",
        "metrics": {},
        "published": "2026-09-29T13:17:44.237",
        "references": [
          {
            "source": "security@mozilla.org",
            "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2073266"
          },
          {
            "source": "security@mozilla.org",
            "url": "https://www.mozilla.org/security/advisories/mfsa2026-100/"
          },
          {
            "source": "security@mozilla.org",
            "url": "https://www.mozilla.org/security/advisories/mfsa2026-97/"
          },
          {
            "source": "security@mozilla.org",
            "url": "https://www.mozilla.org/security/advisories/mfsa2026-99/"
          }
        ],
        "sourceIdentifier": "security@mozilla.org",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.