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CVE-2025-59043

Potential Denial of Service when processing malicious unauthenticated JSON requests

Severity
High 7.5
Published
17 Oct 2025
Last changed
19 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
2.4.0, 2.4.1
Also known as
GHSA-g46h-2rq9-gw5m
Sources
NVD, Project advisories (GitHub)

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…

Affected software

SoftwareAffected versions
OpenBaoServers and applications · cpe:a:openbao:openbao
  • Every version before 2.4.1
OpenBaoServers and applications · github:openbao/openbao
  • Every version before 2.4.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-59043
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-59043
  • GitHub Advisory Database https://github.com/advisories/GHSA-g46h-2rq9-gw5m
  • github.com https://github.com/openbao/openbao/security/advisories/GHSA-g46h-2rq9-gw5m