CVE-2026-0877

{"id": "CVE-2026-0877", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-0877", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-13T15:24:18.449019Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.6}]}, "affected": [{"source": "security@mozilla.org", "affectedData": [{"vendor": "Mozilla", "product": "Firefox", "versions": [{"status": "unaffected", "version": "115.32", "versionType": "rpm", "lessThanOrEqual": "115.*"}, {"status": "unaffected", "version": "140.7", "versionType": "rpm", "lessThanOrEqual": "140.*"}, {"status": "unaffected", "version": "147", "versionType": "rpm", "lessThanOrEqual": "*"}]}, {"vendor": "Mozilla", "product": "Thunderbird", "versions": [{"status": "unaffected", "version": "140.7", "versionType": "rpm", "lessThanOrEqual": "140.*"}, {"status": "unaffected", "version": "147", "versionType": "rpm", "lessThanOrEqual": "*"}]}]}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "affectedData": [{"cpes": ["cpe:/o:redhat:rhel_els:7"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux Server (v. 7 ELS)", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux_eus:10.0"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream EUS (v. 10.0)", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:10.1"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream (v. 10)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:8::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream (v. 8)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.2::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream AUS (v. 8.2)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream AUS (v.8.4)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream AUS (v.8.6)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:8.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream E4S (v.8.6)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_tus:8.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream TUS (v.8.6)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:8.8::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream E4S (v.8.8)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_tus:8.8::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream TUS (v.8.8)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.0::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream E4S (v.9.0)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.2::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream E4S (v.9.2)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.4::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream EUS (v.9.4)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream EUS (v.9.6)", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:9::appstream"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux AppStream (v. 9)", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:10"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:7"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "defaultStatus": "affected"}]}], "published": "2026-01-13T14:16:38.270", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1999257", "tags": ["Permissions Required"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-01/", "tags": ["Vendor Advisory"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-02/", "tags": ["Vendor Advisory"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-03/", "tags": ["Vendor Advisory"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-04/", "tags": ["Vendor Advisory"], "source": "security@mozilla.org"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-05/", "tags": ["Vendor Advisory"], "source": "security@mozilla.org"}, {"url": "https://access.redhat.com/errata/RHSA-2026:0667", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:0694", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:0924", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:1320", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:1413", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:1414", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:1415", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:1461", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:1462", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:1471", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:1487", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2041", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2043", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2044", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2047", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2069", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2070", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2073", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2074", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2220", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2231", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2271", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:2286", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-0877", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2428969", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0877.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-693"}]}], "descriptions": [{"lang": "en", "value": "Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7."}, {"lang": "es", "value": "Elusi\u00f3n de mitigaci\u00f3n en el DOM: Componente de seguridad. Esta vulnerabilidad afecta a Firefox < 147, Firefox ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147 y Thunderbird < 140.7."}], "lastModified": "2026-06-30T03:17:04.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "vulnerable": true, "matchCriteriaId": "D7C58C67-2B8D-493D-8914-F407E35B348A", "versionEndExcluding": "115.32.0"}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "E06AF540-011D-4249-9815-3A4609DD26D1", "versionEndExcluding": "147.0"}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "vulnerable": true, "matchCriteriaId": "4FF5535D-A7D8-46C6-AA5A-8EB3762A9171", "versionEndExcluding": "140.7.0", "versionStartIncluding": "128.0"}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*", "vulnerable": true, "matchCriteriaId": "BFBAB968-3244-4970-8D02-CCF9D5FB958D", "versionEndExcluding": "140.7.0"}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "47B67C0A-B05F-4212-9255-0446302237A5", "versionEndExcluding": "147.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@mozilla.org"}