CVE-2026-58273
Published:October 28, 2026
Updated:October 29, 2026
The "/credentials/signurl" endpoint decides authorization from the client-supplied "X-Rucio-Account" HTTP header instead of the authenticated token's account. Any client holding any valid auth token (even a low-privilege account they legitimately own) can send "X-Rucio-Account: root" to pass the root-only permission check and have the Rucio server mint a presigned read / write / delete URL for an arbitrary object, signed with the RSE's stored S3 / GCS / Swift credentials.
Affected Packages
https://github.com/rucio/rucio.git (GITHUB):
Affected version(s) >=39.0.0 <41.0.0 || >=39.0.0rc1 <41.0.0 || >=40.0.0 <41.0.0 || =40.0.0rc1 <41.0.0Fix Suggestion:
Update to version 41.0.0https://github.com/rucio/rucio.git (GITHUB):
Affected version(s) >=1.16.1 <35.9.0 || >=32.0.0 <35.9.0 || >=32.0.0rc1 <35.9.0 || >=33.0.0 <35.9.0 || >=33.0.0rc1 <35.9.0 || >=34.0.0 <35.9.0 || >=34.0.0rc1 <35.9.0 || >=35.0.0 <35.9.0 || >=35.0.0rc1 <35.9.0Fix Suggestion:
Update to version 35.9.0https://github.com/rucio/rucio.git (GITHUB):
Affected version(s) >=36.0.0 <38.6.0 || >=36.0.0rc1 <38.6.0 || >=37.0.0 <38.6.0 || >=37.0.0rc1 <38.6.0 || >=38.0.0 <38.6.0 || >=38.0.0rc1 <38.6.0Fix Suggestion:
Update to version 38.6.0rucio (PYTHON):
Affected version(s) >=40.0.0 <41.0.0 || >=39.0.0rc1 <41.0.0 || >=39.0.0 <41.0.0 || =40.0.0rc1 <41.0.0Fix Suggestion:
Update to version 41.0.0rucio (PYTHON):
Affected version(s) >=36.0.0rc1 <38.6.0 || >=37.0.0 <38.6.0 || >=37.0.0rc1 <38.6.0 || >=36.0.0 <38.6.0 || >=38.0.0 <38.6.0 || >=38.0.0rc1 <38.6.0Fix Suggestion:
Update to version 38.6.0rucio (PYTHON):
Affected version(s) >=32.0.0rc1 <35.9.0 || >=34.0.0 <35.9.0 || >=1.16.1 <35.9.0 || >=33.0.0rc1 <35.9.0 || >=35.0.0 <35.9.0 || >=33.0.0 <35.9.0 || >=35.0.0rc1 <35.9.0 || >=34.0.0rc1 <35.9.0 || >=32.0.0 <35.9.0Fix Suggestion:
Update to version 35.9.0Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Authorization Bypass Through User-Controlled Key