{"id":"CVE-2019-17026","state":"PUBLISHED","title":"Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. Thi","description":"Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.","publishedAt":"2020-03-02T04:05:03.000Z","updatedAt":"2025-10-21T23:35:50.362Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox ESR","Mozilla Thunderbird","Mozilla Firefox"],"affected":[{"vendor":"Mozilla","product":"Firefox ESR","versions":[{"version":"unspecified","status":"affected","lessThan":"68.4.1","versionType":"custom"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"unspecified","status":"affected","lessThan":"68.4.1","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"72.0.1","versionType":"custom"}]}],"references":["https://www.mozilla.org/security/advisories/mfsa2020-04/","https://www.mozilla.org/security/advisories/mfsa2020-03/","https://bugzilla.mozilla.org/show_bug.cgi?id=1607443","https://security.gentoo.org/glsa/202003-02","https://usn.ubuntu.com/4335-1/","http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17026"],"weaknesses":["CWE-843"],"ingestedAt":"2026-10-29T19:45:38.896Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2019/17xxx/CVE-2019-17026.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2019-17026","state":"PUBLISHED","datePublished":"2020-03-02T04:05:03.000Z","dateUpdated":"2025-10-21T23:35:50.362Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2019-09-30T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1."}],"affected":[{"vendor":"Mozilla","product":"Firefox ESR","versions":[{"version":"unspecified","status":"affected","lessThan":"68.4.1","versionType":"custom"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"unspecified","status":"affected","lessThan":"68.4.1","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"72.0.1","versionType":"custom"}]}],"references":[{"url":"https://www.mozilla.org/security/advisories/mfsa2020-04/","tags":["x_refsource_MISC"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2020-03/","tags":["x_refsource_MISC"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1607443","tags":["x_refsource_MISC"]},{"url":"https://security.gentoo.org/glsa/202003-02","name":"GLSA-202003-02","tags":["vendor-advisory","x_refsource_GENTOO"]},{"url":"https://usn.ubuntu.com/4335-1/","name":"USN-4335-1","tags":["vendor-advisory","x_refsource_UBUNTU"]},{"url":"http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html","tags":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"description":"IonMonkey type confusion with StoreElementHole and FallibleStoreElement","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"mozilla","dateUpdated":"2021-05-13T17:06:23.000Z","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@mozilla.org","ID":"CVE-2019-17026","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Firefox ESR","version":{"version_data":[{"version_affected":"<","version_value":"68.4.1"}]}},{"product_name":"Thunderbird","version":{"version_data":[{"version_affected":"<","version_value":"68.4.1"}]}},{"product_name":"Firefox","version":{"version_data":[{"version_affected":"<","version_value":"72.0.1"}]}}]},"vendor_name":"Mozilla"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"IonMonkey type confusion with StoreElementHole and FallibleStoreElement"}]}]},"references":{"reference_data":[{"name":"https://www.mozilla.org/security/advisories/mfsa2020-04/","refsource":"MISC","url":"https://www.mozilla.org/security/advisories/mfsa2020-04/"},{"name":"https://www.mozilla.org/security/advisories/mfsa2020-03/","refsource":"MISC","url":"https://www.mozilla.org/security/advisories/mfsa2020-03/"},{"name":"https://bugzilla.mozilla.org/show_bug.cgi?id=1607443","refsource":"MISC","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1607443"},{"name":"GLSA-202003-02","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/202003-02"},{"name":"USN-4335-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/4335-1/"},{"name":"http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html","refsource":"MISC","url":"http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.mozilla.org/security/advisories/mfsa2020-04/","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2020-03/","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1607443","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://security.gentoo.org/glsa/202003-02","name":"GLSA-202003-02","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"]},{"url":"https://usn.ubuntu.com/4335-1/","name":"USN-4335-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-05T01:24:48.586Z"}},{"title":"CISA ADP Vulnrichment","references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17026","tags":["government-resource"]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.8,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2019-17026","role":"CISA Coordinator","options":[{"Exploitation":"active"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-02-07T12:48:51.769583Z"}}},{"other":{"type":"kev","content":{"dateAdded":"2021-11-03","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17026"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-843","lang":"en","type":"CWE","description":"CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-21T23:35:50.362Z"},"timeline":[{"time":"2021-11-03T00:00:00.000Z","lang":"en","value":"CVE-2019-17026 added to CISA KEV"}]}]}}}