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{"bugzilla": {"description": "chromium-browser: Heap buffer overflow in PDFium", "id": "2449392", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449392"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A heap buffer overflow flaw was found in the PDFium component of the Chromium browser.\nUpstream bug(s):\nhttps://code.google.com/p/chromium/issues/detail?id=488585504"], "name": "CVE-2026-4455", "public_date": "2026-03-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-4455\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-4455\nhttps://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html\nhttps://issues.chromium.org/issues/488585504"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[146.0.7680.153,146.0.7680.153)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Chrome", "source": "cna", "vendor": "Google"}, "product": "chrome", "vendor": "google"}], "analysis": {"en": {"generated_at": "2026-03-20T19:38:34.957392+00:00", "value": {"mitigation_remediation": ["Update Google Chrome to version 146.0.7680.153 or later.", "Verify that the update has been applied and that the included PDFium library is the fixed version.", "If an immediate update is not possible, disable PDF viewing in Chrome or limit PDF handling to a sandboxed environment."], "summary": {"action": "Patch Now", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "All users of Google Chrome on Windows, macOS, and Linux who are running a build earlier than Chrome version 146.0.7680.153 are affected. The vulnerability exists in the PDFium component of Chrome; upgrading to any supported release equal to or higher than 146.0.7680.153 eliminates the flaw.", "description_and_impact": "PDFium, the PDF rendering engine in Google Chrome, contains a heap buffer overflow that can be triggered by a specially crafted PDF file. The vulnerability can lead to arbitrary code execution on the victim's machine when the PDF is opened, exposing the host to compromise. The weakness is identified by CWE-122 and CWE-787 and is classified as a high severity flaw with a CVSS score of 8.8.", "risk_and_exploitability": "The CVSS base score of 8.8 indicates a high risk to confidentiality, integrity, and availability, and the EPSS score of less than 1% suggests a low likelihood of current exploitation in the wild. The flaw is remotely exploitable without requiring local privileges, via the file system by delivering a malicious PDF that a user opens. The vulnerability is not listed in the CISA KEV catalog, but organizations should still treat it as a high\u2011risk issue because it can enable code execution."}}}}, "created": "2026-03-20T08:53:22.249127+00:00", "updated": "2026-03-25T14:09:50.374365+00:00", "vendors": ["google", "google$PRODUCT$chrome"]}