CVE-2026-20691

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{"bugzilla": {"description": "webkitgtk: A maliciously crafted webpage may be able to fingerprint the user", "id": "2453003", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453003"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-497", "details": ["An authorization issue was addressed with improved state management. This issue is fixed in Safari 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4, watchOS 26.4. A maliciously crafted webpage may be able to fingerprint the user.", "A flaw was found in WebKitGTK. A maliciously crafted web page can cause an authorization issue due to improper state management and may be able to fingerprint the user."], "mitigation": {"lang": "en:us", "value": "Do not visit untrusted web pages or load untrusted web content with WebKitGTK.\nIn Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp.\nThis vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction.\nTo mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface.\nAdditionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality."}, "name": "CVE-2026-20691", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "webkitgtk", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "webkitgtk3", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "webkitgtk4", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "webkit2gtk3", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "webkit2gtk3", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-28T20:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-20691\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-20691\nhttps://webkitgtk.org/security/WSA-2026-0002.html"], "statement": "To exploit this flaw, an attacker needs to trick a user into visiting a maliciously crafted web page. Due to this reason, this flaw has been rated with a moderate severity.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "iOS and iPadOS", "source": "cna", "vendor": "Apple"}, "product": "ios_and_ipados", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "macOS", "source": "cna", "vendor": "Apple"}, "product": "macos", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Safari", "source": "cna", "vendor": "Apple"}, "product": "safari", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "visionOS", "source": "cna", "vendor": "Apple"}, "product": "visionos", "vendor": "apple"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,26.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "watchOS", "source": "cna", "vendor": "Apple"}, "product": "watchos", "vendor": "apple"}], "analysis": {"en": {"generated_at": "2026-03-25T19:56:20.388336+00:00", "value": {"mitigation_remediation": ["Update to Safari\u202f26.4 or later on macOS.", "Update iOS\u202f26.4 /\u202fiPadOS\u202f26.4 on compatible devices.", "Update macOS\u202fTahoe\u202f26.4 on supported systems.", "Update visionOS\u202f26.4 if applicable.", "Update watchOS\u202f26.4 if applicable.", "If an update is not immediately available, block or filter URLs from sites known to serve malicious pages using network or browser security tools."], "summary": {"action": "Apply Patch", "impact": "User Fingerprinting"}, "threat_synthesis": {"affected_systems": "Apple Safari, iOS, iPadOS, macOS, visionOS, and watchOS versions prior to 26.4 are affected. Apple recommends upgrading to Safari\u202f26.4, iOS\u202f26.4 /\u202fiPadOS\u202f26.4, macOS\u202fTahoe\u202f26.4, visionOS\u202f26.4, or watchOS\u202f26.4 to remediate the issue.", "description_and_impact": "An authorization flaw in Apple\u2019s state management for web browsers and operating systems permits maliciously crafted web pages to fingerprint users. The flaw does not allow remote code execution or data exfiltration but can reveal identifying information about the user\u2019s device, browser state, or usage patterns, thereby violating privacy. The weakness is classified as CWE\u2011497.", "risk_and_exploitability": "The vulnerability scores a CVSS 4.3, indicating medium exposure with limited impact on confidentiality or integrity but notable privacy risks. EPSS is reported to be below 1\u202f%, suggesting a low likelihood of exploitation in the wild. Apple does not list this in the KEV catalog. Exploitation likely requires a user to visit a malicious web page, using standard HTTP(S) as the attack vector. Given the privacy implications, the risk to end users is moderate but decreases substantially once the vendor\u2011supplied patch is applied."}}}}, "created": "2026-03-25T11:35:46.985334+00:00", "title": "Apple Device Webpage Fingerprinting Vulnerability Due to Improper State Management", "updated": "2026-03-25T21:16:03.425334+00:00", "vendors": ["apple", "apple$PRODUCT$ios_and_ipados", "apple$PRODUCT$macos", "apple$PRODUCT$safari", "apple$PRODUCT$visionos", "apple$PRODUCT$watchos"]}