CVE-2026-54784
CoreWCF: SPNEGO SecurityContextToken proof key wrapped without confidentiality
描述
### Impact When the proof key recovered from the RSTR can be observed by a party that is not the legitimate client, that party can impersonate the authenticated Windows principal for the lifetime of the SCT (default ~10 hours) and decrypt or forge any subsequent WS‑SecureConversation traffic that uses keys derived from the SCT. #### Preconditions Using security mode TransportWithMessageCredential with client credential type Windows, along with session establishment (which triggers use of WS-SecureConversation). ### Patches Fixed in CoreWCF v1.9.1 ### Workarounds Ensure communication is protected by SSL/TLS to prevent capturing of SCT negotiation handshake.
如何修補 CVE-2026-54784
要修補 CVE-2026-54784,請將受影響套件升級到下列已修補版本。
- —升級至 1.9.1 或更新版本
CVE-2026-54784 正在被利用嗎?
目前沒有被利用訊號。CVE-2026-54784 既不在 CISA KEV 也沒有最新的 EPSS 分數。
受影響套件(1)
- >= 1.9.0, < 1.9.1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |