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地图 / CVE-2026-19931: Negotiate ambient user conn reuse

CVE-2026-19931: Negotiate ambient user conn reuse

身份认证 / Authentication Bypass by Primary Weakness / #3923520

厂商
curl
严重程度
低危
赏金
—
弱点
Authentication Bypass by Primary Weakness
研究员
@dukek
披露日期
2026-09-03
资产
https://github.com/curl/curl
CVE
CVE-2026-19931

该报告还没有中文解读。

原文摘录

摘自原文(2370 字符中的一小部分)
On Windows with SSPI/Negotiate, curl 8.21.0 can reuse a connection authenticated with ambient credentials for a later request using different explicit credentials.
原文中的代码
if(m->want_nego_http) {
  if(conn->creds &&
     (!Curl_creds_same(conn->creds, m->data->state.creds) ||
      !Curl_peer_equal(conn->creds_origin, m->data->state.origin)))
    return FALSE;
}

默认不展示报告全文。以上为简短摘录,完整复现过程请阅读原文。版权归研究员与 curl 所有。

时间线

  • 报告提交
  • 公开披露
阅读 HackerOne 原文 ↗作者 @dukek · 版权归作者与 curl 所有

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CVE-2026-19931: Negotiate ambient user conn reuse · 破甲 POJIA