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NVD / CVE Program· CNA mitre

CVE-2026-33551: An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0.

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: OpenStack Keystone 26.1.1.

Low priority for now. Upgrade to OpenStack Keystone 26.1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user's S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Apr 10, 2026
Updated
Oct 26, 2026
EPSS
0.2% · 13th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.3
CNA · mitre
3.5
1.8 point gap

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Follow CVE-2026-33551

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
openstackkeystone

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • openstack keystone14.0.0 and later · before 26.1.1
  • openstack keystone27.0.0
  • openstack keystone28.0.0
  • openstack keystone29.0.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mitre). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenStack Keystone

    • 27.0.0, 28.0.0, 29.0.0affected
    • 14.0.0 and later · before 26.1.1affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12keystonebefore 2:22.0.2-0+deb12u22:22.0.2-0+deb12u2
Debian:13keystonebefore 2:27.0.0-3+deb13u32:27.0.0-3+deb13u3
Debian:14keystonebefore 2:29.0.0-22:29.0.0-2
PyPIkeystonefrom 14.0.0 · before 26.1.126.1.1
Red Hat:openstack:16.2::el8collectd-sensubilitybefore 0:0.2.1-1.1.el8ost0:0.2.1-1.1.el8ost
Red Hat:openstack:16.2::el8collectd-sensubility-debuginfobefore 0:0.2.1-1.1.el8ost0:0.2.1-1.1.el8ost
Red Hat:openstack:16.2::el8erlangbefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-asn1before 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-asn1-debuginfobefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-compilerbefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-cryptobefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-crypto-debuginfobefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-debuginfobefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-debugsourcebefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-eldapbefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-erl_interface-debuginfobefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-ertsbefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-erts-debuginfobefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-hipebefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-inetsbefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-kernelbefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-mnesiabefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-odbc-debuginfobefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost
Red Hat:openstack:16.2::el8erlang-os_monbefore 0:23.3.4.18-2.el8ost0:23.3.4.18-2.el8ost

+51

Same product

openstack: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-12691An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0.
    36Monitor
  • CVE-2020-12690An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0.
    36Monitor
  • CVE-2019-19687OpenStack Keystone 15.0.0 and 16.0.0 is affected by Data Leakage in the list credentials API.
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2022-2447Sep 1, 2022 · A flaw was found in Keystone.
    26Monitor
  • ← EarlierCVE-2025-65073Nov 17, 2025 · OpenStack Keystone before 26.0.1, 27.0.0, and 28.0.0 allows a /v3/ec2tokens or /v3/s3tokens request with a valid AWS Signature to provide…
    30Monitor
  • Later →CVE-2026-40683Apr 14, 2026 · In OpenStack Keystone before 28.0.1, the LDAP identity backend does not convert the user enabled attribute to a boolean when the…
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
OpenStack Keystone26.1.1Vendor (CNA)
debian:keystone2:22.0.2-0+deb12u2 · Debian:12Package registry (OSV)
PyPI:keystone26.1.1Package registry (OSV)
red hat:openstack-keystone1:19.0.2-17.1.20260529190847.54dd95d.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:openstack-swift0:2.27.1-17.1.20231004180819.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:openstack-swift-account0:2.27.1-17.1.20231004180819.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:openstack-swift-container0:2.27.1-17.1.20231004180819.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:openstack-swift-object0:2.27.1-17.1.20231004180819.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:openstack-swift-proxy0:2.27.1-17.1.20231004180819.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:openstack-tempest1:33.0.0-17.1.20260406141650.1580f6f.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:openstack-tempest-all1:33.0.0-17.1.20260406141650.1580f6f.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:python3-keystone1:19.0.2-17.1.20260529190847.54dd95d.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:python3-swift0:2.27.1-17.1.20231004180819.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:python3-tempest1:33.0.0-17.1.20260406141650.1580f6f.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)
red hat:python3-tempest-tests1:33.0.0-17.1.20260406141650.1580f6f.el9ost · Red Hat:openstack:17.1::el9Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4299848 days apartAn issue was discovered in OpenStack Keystone before 29.0.2.
    35Monitor
  • CVE-2026-4299948 days apartAn issue was discovered in OpenStack Keystone before 29.0.2.
    35Monitor
  • CVE-2026-4300048 days apartAn issue was discovered in OpenStack Keystone before 29.0.2.
    35Monitor
  • CVE-2026-4300121 days apartAn issue was discovered in OpenStack Keystone before 29.0.2.
    32Monitor
  • CVE-2026-4439448 days apartAn issue was discovered in OpenStack Keystone before 29.0.2.
    32Monitor
  • CVE-2026-80182137 days apartIn OpenStack Keystone before 29.0.3, tokens obtained via OAuth1 access token, application credential, or trust-scoped authentication could…
    30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-863 · Incorrect Authorization

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records