CVE-2021-3563 — Vulnerability in keystone — CVE Details
CRITICAL
Openstack Keystone Incorrect Authorization vulnerability
Published June 29, 2026Updated July 1, 2026Source: osv
Summary
A flaw was found in openstack-keystone, only the first 72 characters of an application secret are verified allowing attackers bypass some password complexity which administrators may be counting on. The highest threat from this vulnerability is to data confidentiality and integrity. A [patch](https://opendev.org/openstack/keystone/commit/7859ed26003858ebfd9a5e866b43f1a6a9e83dca) is available.
Advisory Timeline
- First published June 29, 2026 (105 days ago).
- Last revised July 1, 2026 — 2 days after initial publication.
Affected Packages (1)
Affects 1 ecosystem: pypi (1).
| Package | Ecosystem | Affected | Fixed In |
|---|---|---|---|
| keystone | pypi | 12.0.2, 12.0.3, 13.0.2, 13.0.3 (+30 more) | Range-based data available |
CVSS Score Breakdown
What the CVSS (Common Vulnerability Scoring System) 9.1 score means for each attack dimension.
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-3563ADVISORY
- https://access.redhat.com/security/cve/CVE-2021-3563WEB
- https://bugs.launchpad.net/ossa/+bug/1901891WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=1962908WEB
- https://lists.debian.org/debian-lts-announce/2024/01/msg00007.htmlWEB
- https://opendev.org/openstack/keystonePACKAGE
- https://opendev.org/openstack/keystone/commit/7859ed26003858ebfd9a5e866b43f1a6a9e83dcaWEB
- https://review.opendev.org/c/openstack/keystone/+/803641WEB
- https://review.opendev.org/c/openstack/keystone/+/828595WEB
- https://review.opendev.org/c/openstack/keystone/+/856489WEB
- https://security-tracker.debian.org/tracker/CVE-2021-3563WEB
- https://pypi.org/project/keystonePACKAGE
- https://github.com/advisories/GHSA-cc99-whm5-mmq3ADVISORY
Frequently Asked Questions
- What is CVE-2021-3563?
- Openstack Keystone Incorrect Authorization vulnerability This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.1/10).
- How do I check if my project is affected by CVE-2021-3563?
- CVE-2021-3563 affects keystone. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-3563 and 200,000+ other known vulnerabilities.
Severity & Exploitability
CVSS Score
9.1
Exploitation is straightforward and causes maximum impact. Patch immediately.
Also Known As
PYSEC-2026-370
GHSA-cc99-whm5-mmq3
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