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{"bugzilla": {"description": "mysql: Parser unspecified vulnerability (CPU Jan 2026)", "id": "2431381", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2431381"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Parser). Supported versions that are affected are 9.0.0-9.5.0. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)."], "name": "CVE-2026-21952", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "mysql8.4", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "mysql:8.0/mysql", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "mysql:8.4/mysql", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "mysql", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "mysql:8.4/mysql", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-21952\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-21952\nhttps://www.oracle.com/security-alerts/cpujan2026.html#AppendixMSQL"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Oracle MySQL Critical Patch Update.", "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-18T15:39:20.919504+00:00", "value": {"mitigation_remediation": ["Apply a patch or upgrade Oracle MySQL Server to a version later than 9.5.0 that includes the remedy for the Parser vulnerability.", "Restrict inbound network traffic to the MySQL Server to only trusted hosts and limit the use of non-essential protocols that may trigger the parser.", "Monitor MySQL Server logs and system metrics for unexpected hangs or crash events and be prepared to restart or remediate services as part of a service\u2011level availability plan."], "summary": {"action": "Apply Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Oracle MySQL Server versions from 9.0.0 through 9.5.0 are affected. The vulnerability is present only in the Server: Parser component and affects all editions of the product that fall within the specified version range.", "description_and_impact": "Vulnerability in Oracle MySQL Server\u2019s Parser component can be triggered by a high\u2011privileged attacker with network access, allowing the server to become unresponsive or crash repeatedly. The flaw falls under CWE\u2011400 and leads to a significant availability impact, potentially disrupting all database services that depend on the affected MySQL instance.", "risk_and_exploitability": "With a CVSS 3.1 base score of 4.9 the vulnerability is moderately risky, and the EPSS indicates a less than 1 percent probability of exploitation. The advertised attack vector is over the network (AV:N) using any available protocol, requiring high privileges on the target system. The vulnerability is not listed in CISA\u2019s KEV, implying no publicly disclosed exploits as of now. Nonetheless, an attacker that succeeds could cause a denial of service by repeatedly crashing the server, undermining business continuity."}}}}, "created": "2026-04-18T15:45:04.273416+00:00", "updated": "2026-04-18T15:45:04.273426+00:00", "vendors": []}