{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-09-13T14:56:02.091","vulnerabilities":[{"cve":{"id":"CVE-2026-4371","sourceIdentifier":"security@mozilla.org","published":"2026-03-24T21:16:29.583","lastModified":"2026-07-15T02:22:39.793","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9."},{"lang":"es","value":"Un servidor de correo malicioso podría enviar cadenas malformadas con longitudes negativas, haciendo que el analizador lea memoria fuera del búfer. Si un servidor de correo o una conexión a un servidor de correo fueran comprometidos, un atacante podría hacer que el analizador funcione mal, potencialmente bloqueando Thunderbird o filtrando datos sensibles. Esta vulnerabilidad afecta a Thunderbird &lt; 149 y Thunderbird &lt; 140.9."}],"affected":[{"source":"security@mozilla.org","affectedData":[{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.9","lessThanOrEqual":"140.*","versionType":"rpm","status":"unaffected"},{"version":"149","lessThanOrEqual":"*","versionType":"rpm","status":"unaffected"}]}]},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","affectedData":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","defaultStatus":"affected","collectionURL":"https://catalog.redhat.com/software/containers/","packageName":"thunderbird","cpes":["cpe:/o:redhat:enterprise_linux:10.1"],"versions":[{"version":"0:140.9.0-1.el10_1","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"versions":[{"version":"0:140.9.0-1.el10_0","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:enterprise_linux:8"],"versions":[{"version":"0:140.9.0-1.el8_10","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.2 Advanced Update Support","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_aus:8.2"],"versions":[{"version":"0:140.9.0-1.el8_2","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_aus:8.4"],"versions":[{"version":"0:140.9.0-1.el8_4","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_eus_long_life:8.4"],"versions":[{"version":"0:140.9.0-1.el8_4","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_aus:8.6"],"versions":[{"version":"0:140.9.0-1.el8_6","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Telecommunications Update Service","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_tus:8.6"],"versions":[{"version":"0:140.9.0-1.el8_6","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_e4s:8.6"],"versions":[{"version":"0:140.9.0-1.el8_6","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_tus:8.8"],"versions":[{"version":"0:140.9.0-1.el8_8","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_e4s:8.8"],"versions":[{"version":"0:140.9.0-1.el8_8","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:enterprise_linux:9"],"versions":[{"version":"0:140.9.0-1.el9_7","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_e4s:9.0"],"versions":[{"version":"0:140.9.0-1.el9_0","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_e4s:9.2"],"versions":[{"version":"0:140.9.0-1.el9_2","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_eus:9.4"],"versions":[{"version":"0:140.9.0-1.el9_4","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/a:redhat:rhel_eus:9.6"],"versions":[{"version":"0:140.9.0-1.el9_6","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhel10/thunderbird-flatpak","cpes":["cpe:/o:redhat:enterprise_linux:10"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"thunderbird","cpes":["cpe:/o:redhat:enterprise_linux:7"]}]}],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":5.2},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":4.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-03-25T16:24:48.052212Z","id":"CVE-2026-4371","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-126"}]},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","type":"Secondary","description":[{"lang":"en","value":"CWE-130"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*","versionEndExcluding":"140.9.0","matchCriteriaId":"4C0558B1-4113-45A8-8E37-A0793A67AD6D"},{"vulnerable":true,"criteria":"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*","versionEndExcluding":"149.0","matchCriteriaId":"40FE4697-89F1-46F6-8E28-41883647583B"}]}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2023493","source":"security@mozilla.org","tags":["Permissions Required"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-23/","source":"security@mozilla.org","tags":["Vendor Advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-24/","source":"security@mozilla.org","tags":["Vendor Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:6188","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:6342","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:6917","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8284","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8285","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8286","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8287","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8288","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8289","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8290","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8315","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:8850","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-4371","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451001","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4371.json","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}]}}]}