Rucio: Authorisation Bypass on REST API endpoint for signing URLs

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-58273
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-05 22:18:49 UTC
Updated2026-11-06 18:18:14 UTC
DescriptionRucio is a scientific data management framework. From 1.16.1 until 35.9.0, 38.6.0, and 41.0.0rc1, the /credentials/signurl endpoint reads X-Rucio-Account instead of the account stored in request.environ['issuer'] by token authentication. Any authenticated low-privilege user can supply root as the header value and pass the root-only get_signed_url permission check. The server then returns a presigned read, write, or delete URL for an attacker-selected object using stored S3, GCS, or Swift credentials, and X-Rucio-VO can select another tenant in multi-VO deployments. This permits data disclosure, modification, deletion, and cross-tenant access on cloud-backed RSEs. This issue is fixed in versions 35.9.0, 38.6.0, and 41.0.0rc1.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

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

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Rucio Rucio affected >= 1.16.1, < 35.9.0 Not specified
CNA Rucio Rucio affected >= 36.0.0, < 38.6.0 Not specified
CNA Rucio Rucio affected >= 39.0.0, < 41.0.0rc1 Not specified

References

ReferenceSourceLinkTags
github.com/rucio/rucio/commit/8bdc38994a8766658d0314d36afc104c9242c96f [email protected] github.com
github.com/rucio/rucio/releases/tag/41.0.0rc1 [email protected] github.com
github.com/rucio/rucio/security/advisories/GHSA-5j9r-fx4x-rpvg 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/rucio/rucio/commit/8d9ba31514e6f5dca32b8c1db4738582cb37ec3a [email protected] github.com
github.com/rucio/rucio/releases/tag/38.6.0 [email protected] github.com
github.com/rucio/rucio/commit/64c0e6a6a93ae88427ff3b7d77532ce08c8a69ec [email protected] github.com
github.com/rucio/rucio/releases/tag/35.9.0 [email protected] github.com
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