{"api_version":"1","generated_at":"2026-07-24T23:42:54+00:00","cve":"CVE-2023-37475","urls":{"html":"https://cve.report/CVE-2023-37475","api":"https://cve.report/api/cve/CVE-2023-37475.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-37475","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-37475"},"summary":{"title":"CVE-2023-37475","description":"Hamba avro is a go lang encoder/decoder implementation of the avro codec specification. In affected versions a well-crafted string passed to avro's `github.com/hamba/avro/v2.Unmarshal()` can throw a `fatal error: runtime: out of memory` which is unrecoverable and can cause denial of service of the consumer of avro. The root cause of the issue is that avro uses part of the input to `Unmarshal()` to determine the size when creating a new slice and hence an attacker may consume arbitrary amounts of memory which in turn may cause the application to crash. This issue has been addressed in commit `b4a402f4` which has been included in release version `2.13.0`. Users are advised to upgrade. There are no known workarounds for this vulnerability.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-07-17 17:15:00","updated_at":"2023-07-26 21:35:00"},"problem_types":["CWE-400"],"metrics":[],"references":[{"url":"https://github.com/hamba/avro/commit/b4a402f41cf44b6094b5131286830ba9bb1eb290","name":"https://github.com/hamba/avro/commit/b4a402f41cf44b6094b5131286830ba9bb1eb290","refsource":"MISC","tags":[],"title":"feat: add max byte slice size config (#273) · hamba/avro@b4a402f · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/hamba/avro/security/advisories/GHSA-9x44-9pgq-cf45","name":"https://github.com/hamba/avro/security/advisories/GHSA-9x44-9pgq-cf45","refsource":"MISC","tags":[],"title":"Attacker-controlled parameter can cause DoS of avro · Advisory · hamba/avro · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-37475","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-37475","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"37475","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"avro_project","cpe5":"avro","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"go","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-37475","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"Hamba avro is a go lang encoder/decoder implementation of the avro codec specification. 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