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CVE-2016-4911
The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent…
Medium4.3EPSS 1.4%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The Fernet Token Provider in OpenStack Identity (Keystone) 9.0.x before 9.0.1 (mitaka) allows remote authenticated users to prevent revocation of a chain of tokens and bypass intended access restrictions by rescoping a token.
Timeline
ID reserved
By mitre
- 27 days later
· 27 days later
Published
- 8 years later
· 8 years 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 |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 1.4% · top 27% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIkeystoneGHSA-f82m-w3p3-cgp3 (opens in a new tab)
References (6)
- https://bugs.launchpad.net/keystone/+bug/1577558 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20160517 CVE request for vulnerability in OpenStack Keystone (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 90728 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://security.openstack.org/ossa/OSSA-2016-008.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://review.openstack.org/#/c/311886/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20160517 Re: CVE request for vulnerability in OpenStack Keystone (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
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-f82m-w3p3-cgp3 (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-2016-4911)Record last updated .