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Fencer Vulns
high 7.6

CVE-2026-90460 json

An issue was discovered in OpenStack Keystone before 29.0.3.

published 2026-09-11 58 d ago modified 2026-10-13 26 d ago also EUVD-2026-76758

cvss
7.6
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

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.

Patch / fix

  • OpenStack Keystone 27.0.3, 28.0.3, 29.0.3
  • keystone Debian 12 2:22.0.2-0+deb12u5
  • keystone Debian 13 2:27.0.0-3+deb13u6
  • keystone Debian 14 2:30.0.0~rc1-1

debian advisories DEBIAN-CVE-2026-90460

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-2026-90460 updated cvss 7.1

openstack-keystone: openstack-keystone: PATCH /v3/credentials accepts unauthorized post-update project_id; EC2-derived tokens bypass delegation scope check

  • Red Hat OpenStack Platform 13 (Queens) python-keystone, openstack-keystone Red Hat OpenStack Platform 16.2 python3-keystone, openstack-keystone Red Hat OpenStack Platform 17.1 python3-keystone, openstack-keystone Red Hat OpenStack Platform 18.0 openstack-keystone
    affected: workaround, no fix available

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

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
55 d ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • launchpad.net https://launchpad.net/bugs/2159643 referenced PoC, tagged "exploit" by a source, unverified
  • launchpad.net https://launchpad.net/bugs/2158931 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 7.6 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
CNA 4.0 7.6 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • OpenStack Keystone

Classification

Weakness

References

Sources

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.