GHSA-q623-f4j4-p4xj · 深刻度: medium · エコシステム: pip — OpenStack Keystone has an Incorrect Authorization issue
An issue was discovered in OpenStack Keystone before 29.0.2. When combined with an application credential impersonation vulnerability, an attacker with the member role on a project can escalate to admin by chaining unrestricted application credentials with Keystone trusts. The impersonated token carries the victim's identity, which passes the trustor validation check. Keystone then validates the delegated roles against the victim's actual role assignments in the database, not the roles on the requesting token. This allows the attacker to create a trust delegating the victim's admin role to themselves. The trust persists independently, and additional trusts and application credentials can be created to maintain access. All actions are logged under the victim's identity.
総合評価: CVE-2026-43000 は公開エクスプロイトあり(50/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.33%、25 パーセンタイル) 根拠: 公開エクスプロイトが 1 件参照されています(Exploit-DB)。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-06-30 | 0.24% | 0.33% | +0.08% |
| 2 | 2026-06-15 | 0.03% | 0.24% | +0.21% |
| 3 | 2026-05-29 | — | 0.03% | — |
EPSS の全履歴 (全 3 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 6.0 | 3.1 | MEDIUM |
|
1.8 | 3.7 | [email protected] |
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | [email protected] |
| 8.4 | 3.1 | HIGH |
|
1.8 | 6.0 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
GHSA-q623-f4j4-p4xj · 深刻度: medium · エコシステム: pip — OpenStack Keystone has an Incorrect Authorization issue
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-43000 not yet assigned priority: Debian including 1 source packages (keystone), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-43000 |
ubuntu
|
medium | CVE-2026-43000 medium priority: Ubuntu including 1 source packages (keystone), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, upstream, xenial): needs-triage 7, released 1. | https://ubuntu.com/security/CVE-2026-43000 |
| URL | タグ |
|---|---|
| https://bugs.launchpad.net/keystone/+bug/2148477 | Exploit Issue Tracking Patch Third Party Advisory |
| https://security.openstack.org/ossa/OSSA-2026-015.html | Patch Vendor Advisory |
| https://access.redhat.com/security/cve/CVE-2026-43000 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2482826 | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43000.json |