{"schema_version":"1.9.0","id":"BIT-openbao-2025-59043","published":"2026-07-27T05:48:59.037Z","modified":"2026-09-08T08:45:15.664669884Z","aliases":["CVE-2025-59043","GHSA-g46h-2rq9-gw5m","GO-2025-4039"],"summary":"OpenBao vulnerable to denial of service via malicious JSON request processing","details":"OpenBao is an open source identity-based secrets management system. In OpenBao versions prior to 2.4.1, JSON objects after decoding may use significantly more memory than their serialized version. It is possible to craft a JSON payload to maximize the factor between serialized memory usage and deserialized memory usage, similar to a zip bomb, with factors reaching approximately 35. This can be used to circumvent the max_request_size configuration parameter which is intended to protect against denial of service attacks. The request body is parsed into a map very early in the request handling chain before authentication, which means an unauthenticated attacker can send a specifically crafted JSON object and cause an out-of-memory crash. Additionally, for requests with large numbers of strings, the audit subsystem can consume large quantities of CPU. The vulnerability is fixed in version 2.4.1.","affected":[{"package":{"name":"openbao","ecosystem":"Bitnami","purl":"pkg:bitnami/openbao"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.4.1"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/openbao/BIT-openbao-2025-59043.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"references":[{"type":"WEB","url":"https://github.com/openbao/openbao/blob/788536bd3e10818a7b4fb00aac6affc23388e5a9/http/logical.go#L50"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/d418f238bc99adc72c73109faf574cc2b672880c"},{"type":"REPORT","url":"https://github.com/openbao/openbao/pull/1756"},{"type":"ADVISORY","url":"https://github.com/openbao/openbao/security/advisories/GHSA-g46h-2rq9-gw5m"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-59043"}],"database_specific":{"cpes":["cpe:2.3:a:openbao:openbao:*:*:*:*:*:go:*:*"],"severity":"High"}}