CVE-2026-58273 (GCVE-0-2026-58273)

Vulnerability from cvelistv5 – Published: 2026-11-05 21:56 – Updated: 2026-11-06 17:38
VLAI
Title
Rucio: Authorisation Bypass on REST API endpoint for signing URLs
Summary
Rucio 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.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:38 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
rucio rucio Affected: >= 1.16.1, < 35.9.0
Affected: >= 36.0.0, < 38.6.0
Affected: >= 39.0.0, < 41.0.0rc1
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