Concrete CMSに不十分なセッション有効期限の脆弱性(CVE-2026-85387)
概要
Concrete CMSに不十分なセッション有効期限の脆弱性が確認されました。
バージョン 9.5.4 未満に影響があります。
修正版 9.5.4 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID | CVE-2026-85387 |
|---|---|
| 脆弱性の種類 | 不十分なセッション有効期限 |
| 危険度 | 高 |
| CVSSスコア |
7.1(CVSS v3.1) CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
| 公開日 | 2026年9月16日 |
| 更新日 | 2026年9月21日 |
影響を受ける製品
| 製品 | 影響を受けるバージョン | 修正版 | 出典 |
|---|---|---|---|
| Concrete CMS |
9.5.4 未満 | 9.5.4 | NVD(National Vulnerability Database / NIST) |
推奨対応
- Concrete CMSを修正版 9.5.4 またはそれ以降の公式最新版へ更新してください。
情報元の原文
NVD(National Vulnerability Database / NIST)
Concrete CMS before 9.5.4 re-authorized OAuth REST API requests from the bearer token alone and did not re-check the state of the account the token had been issued to. The resource server's authorization validator confirmed only that a token existed, had not expired, and had not been explicitly revoked, and deactivating a user did not revoke that user's outstanding tokens. As a result, a deactivated user retained full access to /ccm/api/1.0/* for the remaining lifetime of any token already issued to them. The same gap applied to accounts that had been deleted or locked pending a forced password reset. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Myq Larson for reporting.
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情報元
- NVD(National Vulnerability Database / NIST)
https://nvd.nist.gov/vuln/detail/CVE-2026-85387