CVE-2026-43001

highpriority · track · 32OT risk · elevatedEPSS 0.005 · 40 %ileEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.47% (40th) EPSS
CVSS 8 · high
Is it mine?
10 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

An issue was discovered in OpenStack Keystone before 29.0.2. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner's role footprint.

01

cvss

Technical severity, 0–10. One row per scoring source.

8.0
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.3 · impact 6
v3.17.9highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Lsecondary · ENISA EU
v3.17.9highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Lsecondary · cve@mitre.org USexploitability 1.3 · impact 6
v3.18highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Hsecondaryexploitability 1.3 · impact 6
v3.17.9highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:Lsecondary · OSV
v3.17.3highCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1288USCWE-863USCWE-863US
04

affected products (10)

Products and version ranges known to be affected.

05

advisories (2)

Vendor and ecosystem advisories describing this.

  • GHSA-hhq2-3832-xxcvOpenStack Keystone has an Incorrect Authorization Issue2026-05-01ghsa · osvUS

    An issue was discovered in OpenStack Keystone 13 through 29. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner's role footprint.

  • PYSEC-2026-6022026-05-01vendor · osvUS

    An issue was discovered in OpenStack Keystone before 29.0.2. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner's role footprint.

06

also known as (6)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdosvnvdNVDCVE.orgMITRE
published 2026-05-01modified 2026-10-26
08

references (16)

External citations — patches, advisories, analysis.

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