CVE-2026-6769

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{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "140.*", "status": "unaffected", "version": "140.10", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "150", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "140.*", "status": "unaffected", "version": "140.10", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "150", "versionType": "rpm"}]}], "source": "security@mozilla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "matchCriteriaId": "15AF037C-5C86-48EB-B1DE-3AC100A34596", "versionEndExcluding": "140.10.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "matchCriteriaId": "67B01D49-66FA-4C76-9EB4-2B8CD61FBEB2", "versionEndExcluding": "150.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*", "matchCriteriaId": "48217E2F-FFD3-4385-B962-15365B293DA7", "versionEndExcluding": "140.10.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."}, {"lang": "es", "value": "Escalada de privilegios en el componente Debugger. Esta vulnerabilidad se corrigi\u00f3 en Firefox 150, Firefox ESR 140.10, Thunderbird 150 y Thunderbird 140.10."}], "id": "CVE-2026-6769", "lastModified": "2026-10-26T22:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6769", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-26T17:52:22.157864Z", "version": "2.0.3"}}]}, "published": "2026-04-21T13:16:22.753", "references": [{"source": "security@mozilla.org", "tags": ["Permissions Required"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2023753"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2026-30/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2026-32/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2026-33/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2026-34/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "firefox: Privilege escalation in the Debugger component", "id": "2460108", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460108"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-266", "details": ["A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:\nPrivilege escalation in the Debugger component"], "name": "CVE-2026-6769", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-21T12:41:02Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-6769\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-6769\nhttps://www.mozilla.org/security/advisories/mfsa2026-32/#CVE-2026-6769"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[140.10,141.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[150,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox", "source": "cna", "vendor": "Mozilla"}, "product": "firefox", "vendor": "mozilla"}], "analysis": {"en": {"generated_at": "2026-04-27T19:49:08.039397+00:00", "value": {"mitigation_remediation": ["Update Mozilla Firefox and Thunderbird to the patched releases (Firefox 150 or later, ESR 140.10 or later; Thunderbird 150 or later, ESR 140.10 or later).", "If an immediate update cannot be applied, disable or remove any add\u2011ons, extensions, or applications that provide debugger access, and set the appropriate about:config preferences to turn off remote debugging.", "Monitor the system for accidental or malicious debugger activity and, if appropriate, disable developer tools for non\u2011development user profiles."], "summary": {"action": "Apply Patch", "impact": "Privilege Escalation"}, "threat_synthesis": {"affected_systems": "Mozilla Firefox versions released before 150 and the ESR 140.10 branch are affected, as are Thunderbird releases before 150 and ESR 140.10. Installers or builds that do not include the patches delivered in those releases remain vulnerable.", "description_and_impact": "A flaw in the Debugger component of Mozilla Firefox and Thunderbird provides a privilege escalation path. The description notes that the bug allows an attacker to gain higher privileges within the same process, but it does not disclose the precise mechanism. The issue is classified as CWE-266, improper privilege management, and CWE-269, inadequate privilege enforcement. If exploited, an attacker could modify the application\u2019s behavior, access sensitive data, or execute arbitrary code with the privileges of the target process.", "risk_and_exploitability": "The CVSS score is 8.8, indicating a high impact if exploited. The EPSS score is less than 1%, suggesting a very low probability of exploitation at this time, and it is not listed in the CISA KEV catalog. Based on the description, it is inferred that the likely attack vector involves a user or process that can invoke or manipulate the debugger \u2013 for example, a malicious add\u2011on with debugger privileges, or an extension that uses the remote debugging API. Deployments that expose the debugger interface to untrusted users or applications therefore face a higher risk."}}}}, "created": "2026-04-21T17:15:25.103416+00:00", "updated": "2026-04-27T20:00:05.651564+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox"]}