{"id":"CVE-2025-59043","revision":"e3548210c75d424f95122671048f74cf","records":[{"revision":"e3548210c75d424f95122671048f74cf","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-59043","aliases":[],"title":"OpenBao vulnerable to denial of service via malicious JSON request processing","description":"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.","state":0,"publishedAt":"2025-10-17T16:03:23.584+00:00","modifiedAt":"2025-10-17T17:22:52.795+00:00","affected":[{"ecosystem":"Vendor product","name":"openbao","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"openbao\",\n                    \"product\": \"openbao\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.4.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/openbao/openbao/security/advisories/GHSA-g46h-2rq9-gw5m","https://github.com/openbao/openbao/pull/1756","https://github.com/openbao/openbao/commit/d418f238bc99adc72c73109faf574cc2b672880c","https://github.com/openbao/openbao/blob/788536bd3e10818a7b4fb00aac6affc23388e5a9/http/logical.go#L50"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-59043","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-59043","identifiers":["CVE-2025-59043"]},"retained":false,"historicalAffected":[]}],"coverage":[]}