CVE-2026-58273
Rucio: Authorisation Bypass on REST API endpoint for signing URLs
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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.
Public exploit
A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
- https://github.com/rucio/rucio/security/advisories/GHSA-5j9r-fx4x-rpvg (opens in a new tab)x_refsource_CONFIRMexploit
Timeline
ID reserved
By GitHub_M
- 4 months later
· 4 months later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Received | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.56% · top 53% of all CVEs (8 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
References (7)
- https://github.com/rucio/rucio/security/advisories/GHSA-5j9r-fx4x-rpvg (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/rucio/rucio/commit/64c0e6a6a93ae88427ff3b7d77532ce08c8a69ec (opens in a new tab)x_refsource_MISC
- https://github.com/rucio/rucio/commit/8bdc38994a8766658d0314d36afc104c9242c96f (opens in a new tab)x_refsource_MISC
- https://github.com/rucio/rucio/commit/8d9ba31514e6f5dca32b8c1db4738582cb37ec3a (opens in a new tab)x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/35.9.0 (opens in a new tab)x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/38.6.0 (opens in a new tab)x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/41.0.0rc1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-5j9r-fx4x-rpvg (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-58273)Record last updated .