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{"bugzilla": {"description": "dotnet: .NET: Denial of Service via Infinite Recursion in XmlDecryptionTransform", "id": "2457741", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457741"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-776", "details": ["A flaw was found in .NET. A remote attacker could exploit this vulnerability by crafting a malicious XML document that triggers an infinite recursion within the XmlDecryptionTransform component. This could lead to a Denial of Service (DoS), making the affected system unresponsive."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-33116", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "dotnet10.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "dotnet9.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "dotnet10.0", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "dotnet9.0", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-04-14T18:38:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-33116\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-33116"], "statement": "This is an Important denial of service vulnerability in .NET's XmlDecryptionTransform. An attacker could exploit this flaw by providing specially crafted XML data, leading to an infinite recursion and causing a denial of service in applications processing such data. This affects Red Hat Enterprise Linux versions 8, 9, and 10, as well as Fedora.", "threat_severity": "Important"}

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and temporarily block offending IP addresses."], "summary": {"action": "Patch", "impact": "Denial of Service via infinite loop in .NET components"}, "threat_synthesis": {"affected_systems": "Microsoft .NET 10.0, .NET 9.0, .NET 8.0, .NET Framework 3.5, .NET Framework 3.5 with 4.7.2, .NET Framework 4.6.2/4.7/4.7.1/4.7.2, .NET Framework 4.8, and associated Visual Studio products are potentially impacted, but only the product names are listed; specific affected sub\u2011versions were not supplied.", "description_and_impact": "An unreachable exit condition creates an infinite loop in .NET, .NET Framework and Visual Studio code paths. The constantly spinning loop consumes CPU resources, rendering the affected application or service unresponsive and effectively denying service to legitimate users. The weakness is identified as improper input handling (CWE-20), resource exhaustion (CWE-400), infinite loop (CWE-835), and improper data flow (CWE-776).", "risk_and_exploitability": "The CVSS score of 7.5 denotes a high risk level, and no EPSS data is available. The vulnerability is not currently in the CISA KEV catalog. The primary attack vector is over the network, where an unauthenticated attacker can trigger the vulnerable code path to induce the infinite loop. Successful exploitation will lead to resource exhaustion and denial of service for authorized users. Because the vulnerability can be triggered remotely without requiring privileged credentials, the likelihood of exploitation remains significant until a patch is applied."}}}}, "created": "2026-04-15T15:00:06.172151+00:00", "updated": "2026-04-15T21:02:40.721626+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$.net", "microsoft$PRODUCT$.net_framework"]}