CVE-2016-4911 json
OpenStack Identity Keystone Improper Access Control
published 2016-06-13 10 y ago modified 2026-06-17 4 mo ago also GHSA-f82m-w3p3-cgp3 , PYSEC-2016-38 , EUVD-2016-0012
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi keystone 9.0.1
- keystone Debian 14, Debian 13, Debian 12 2:9.0.0-2
debian advisories DEBIAN-CVE-2016-4911
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2016-4911 updated cvss 4.3
openstack-keystone: Incorrect Audit IDs in Keystone Fernet Tokens can result in revocation bypass
-
Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) openstack-keystone Red Hat Enterprise Linux OpenStack Platform 6 (Juno) openstack-keystone Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) python-keystone, openstack-keystone Red Hat JBoss Fuse 6 openstack-keystone Red Hat OpenShift Enterprise 2 openstack-keystone Red Hat OpenStack Platform 8 (Liberty) python-keystone, openstack-keystonenot affected: vulnerable code not present
+1 more productsfewer
Red Hat OpenStack Platform 9 (Mitaka) python-keystone, openstack-keystone, python-keystone-tests
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
1.40% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:P/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.0 | 4.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | keystone | >=9.0.0, <9.0.1 |
9.0.1 |
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
security.openstack.org
/ossa/OSSA-2016-008.html
web, patch, vendor-advisory, advisory
-
github.com
/openstack/keystone/commit/0d376025bae61bf5ee19d992c7f336b99ac69240
web
-
github.com
/openstack/keystone/commit/ee1dc941042d1f71699971c5c30566af1b348572
web
-
bugs.launchpad.net
/keystone/+bug/1577558
web, vendor-advisory, advisory
-
review.openstack.org
/#/c/311886/
vendor-advisory, advisory
-
openwall.com
/lists/oss-security/2016/05/17/10
mailing-list, web, article
-
securityfocus.com
/bid/90728
vdb-entry, third-party-advisory, advisory
-
openwall.com
/lists/oss-security/2016/05/17/11
mailing-list, web, article
-
nvd.nist.gov
/vuln/detail/CVE-2016-4911
advisory
-
github.com
/openstack/keystone
package
-
github.com
/pypa/advisory-database/tree/main/vulns/keystone/PYSEC-2016-38.yaml
web
-
review.openstack.org
/#/c/311886
web
Sources
- CVE List CVE-2016-4911
- GitHub Advisory GHSA-f82m-w3p3-cgp3
- NVD CVE-2016-4911
- OSV PYSEC-2016-38
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.