{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33524","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-20T18:05:11.829Z","datePublished":"2026-04-24T18:18:02.913Z","dateUpdated":"2026-04-27T13:35:28.660Z"},"containers":{"cna":{"title":"Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization","problemTypes":[{"descriptions":[{"cweId":"CWE-789","lang":"en","description":"CWE-789: Memory Allocation with Excessive Size Value","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/ndsev/zserio/security/advisories/GHSA-cwq5-8pvq-j65j","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ndsev/zserio/security/advisories/GHSA-cwq5-8pvq-j65j"}],"affected":[{"vendor":"ndsev","product":"zserio","versions":[{"version":"< 2.18.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-24T18:18:02.913Z"},"descriptions":[{"lang":"en","value":"Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1."}],"source":{"advisory":"GHSA-cwq5-8pvq-j65j","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-27T13:20:21.391216Z","id":"CVE-2026-33524","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-27T13:35:28.660Z"}}]}}