CVE-2025-59043 (GCVE-0-2025-59043)
Vulnerability from cvelistv5 – Published: 2025-10-17 16:03 – Updated: 2025-10-17 17:22
VLAI
EPSS
VEX
Title
OpenBao vulnerable to denial of service via malicious JSON request processing
Summary
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.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-17 17:22 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/openbao/openbao/security/advis… | x_refsource_CONFIRM |
| https://github.com/openbao/openbao/pull/1756 | x_refsource_MISC |
| https://github.com/openbao/openbao/commit/d418f23… | x_refsource_MISC |
| https://github.com/openbao/openbao/blob/788536bd3… | x_refsource_MISC |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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