7.6

CVE-2026-90460: openstack keystone Incorrect Authorization

CVSS: 7.6v4.0HighAwaiting analysis
AliasesUBUNTU-CVE-2026-90460DEBIAN-CVE-2026-90460
Published 11-09-2026Last modified 13-10-2026
Open JSON

Vulnerability summary

CVE-2026-90460 is a high (CVSS 7.6) Incorrect Authorization vulnerability in openstack keystone. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 46.2% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.6/10
010
High · v4.0 (CVE.org)
EPSS score
0.57%
0%100%
Low · +0.24 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 13-10-2026
    Last modifiedVulnerability information updated.

Description

An issue was discovered in OpenStack Keystone before 29.0.3. Tokens obtained via delegated authentication methods (EC2 credentials, application credentials, OAuth1 access tokens, and trusts) are not blocked from creating, modifying, or deleting credentials via the /v3/credentials API. EC2-derived tokens can additionally read credential blobs, exposing TOTP MFA seeds and other secrets. Also, PATCH /v3/credentials does not validate the requested post-update project_id, allowing any delegated token to move a credential to an unauthorized project. All Keystone deployments using delegated authentication are affected.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

+0.24 pp

From 0.34% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.57%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • keystoneAll versions (No fix recorded) | < 2:22.0.2-0+deb12u5 | < 2:27.0.0-3+deb13u6 | < 2:30.0.0~rc1-1
Openstack1 product
  • keystone≥ 13.0.0, < 27.0.3 | ≥ 28.0.0, < 28.0.3 | ≥ 29.0.0, < 29.0.3
Ubuntu1 product
  • keystoneAll versions (No fix recorded)

3 vendors · 3 products

References

10 links