CVE-2026-5273

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{"bugzilla": {"description": "chromium-browser: Use after free in CSS", "id": "2453694", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453694"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["An use after free flaw was found in the CSS component of the Chromium browser.\nUpstream bug(s):\nhttps://code.google.com/p/chromium/issues/detail?id=493952652"], "name": "CVE-2026-5273", "public_date": "2026-03-31T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-5273\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-5273\nhttps://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_31.html\nhttps://issues.chromium.org/issues/493952652"], "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": "[146.0.7680.178,146.0.7680.178)"}}], "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": "2026-04-02T04:43:05.660614+00:00", "value": {"mitigation_remediation": ["Upgrade Chrome to version 146.0.7680.178 or later; verify that the update has been applied."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The flaw affects all major builds of Google Chrome that precede update 146.0.7680.178. The vulnerability is platform independent and is present on Windows, macOS, and Linux installations, as indicated by the included CPE identifiers. Any user running a vulnerable version of Chrome is potentially exposed.", "description_and_impact": "A use after free bug in Chrome's CSS engine permits a remote attacker to load a specially crafted HTML file that triggers a memory corruption in the sandboxed browsing context. The flaw originates from an uninitialized pointer that is freed and later accessed by the rendering engine. Exploiting this vulnerability allows the attacker to execute arbitrary code inside the browser sandbox, which could then be used to bypass sandbox constraints and gain higher privileges or access sensitive data. The issue is classified as High severity within Chromium's internal risk assessment.", "risk_and_exploitability": "The CVSS score of 6.3 indicates a moderate level of severity, and the EPSS score of less than 1% suggests that the likelihood of exploitation in the wild is currently low. The vulnerability is not yet listed in the CISA KEV catalog, and no public proof\u2011of\u2011concept exploits have been reported. However, because the flaw requires a user to open a crafted web page, it is exploitable in drive\u2011by scenarios or through phishing links, making the risk significant for users who frequently visit untrusted sites."}}}}, "created": "2026-04-02T07:50:02.029808+00:00", "updated": "2026-04-02T20:18:14.309927+00:00", "vendors": ["google", "google$PRODUCT$chrome"]}