OpenBao: Transit secrets engine crashes on key creation with `derived: true` for asymmetric key types

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55776
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-15 16:17:16 UTC
Updated2026-09-17 16:17:31 UTC
DescriptionOpenBao 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.004550000 probability, percentile 0.388370000 (date 2026-09-23)

Problem Types: CWE-617 | CWE-617 CWE-617: Reachable Assertion

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Openbao Openbao affected < 2.5.5 Not specified

References

ReferenceSourceLinkTags
github.com/openbao/openbao/pull/3309 [email protected] github.com
github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/openbao/openbao/commit/db57c62602b25da12951f3f0edb888e7c4da61e5 [email protected] github.com
github.com/openbao/openbao/releases/tag/v2.6.0 [email protected] github.com
github.com/openbao/openbao/pull/3312 [email protected] github.com
github.com/openbao/openbao/releases/tag/v2.5.5 [email protected] github.com
github.com/openbao/openbao/commit/bb17827f3e33779a10166f7d0e61b191c0facef9 [email protected] github.com
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