OpenBao: Transit secrets engine crashes on key creation with `derived: true` for asymmetric key types
OpenBao is an open source identity-based secrets management system. Prior to 2.5.5, an authenticated OpenBao caller with write access to transit/keys/* could terminate the server process by setting derived to true while the type parameter selected rsa-, ecdsa-, or ed25519. The Transit policy creation path in builtin/logical/transit/backend.go and sdk/helper/keysutil/policy.go could reach an error path that double-unlocked a mutex while handling this invalid asymmetric derived-key combination, causing a panic, no HTTP response, process exit, and denial of service. JSON and HCL key-creation requests can express the triggering combination. This issue is fixed in version 2.5.5.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-55776US | — | — | ||
OpenBao is an open source identity-based secrets management system. Prior to 2.5.5, an authenticated OpenBao caller with write access to transit/keys/* could terminate the server p… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/openbao/openbao/commit/bb17827f3e33779a10166f7d0e61b191c0facef9WEB
- https://github.com/openbao/openbao/commit/db57c62602b25da12951f3f0edb888e7c4da61e5WEB
- https://github.com/openbao/openbao/pull/3309WEB
- https://github.com/openbao/openbao/pull/3312WEB
- https://github.com/openbao/openbao/releases/tag/v2.5.5WEB
- https://github.com/openbao/openbao/releases/tag/v2.6.0WEB
- https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4jWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-55776WEB
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