hostname using Negotiate authentication, when the initial request is done
using empty credentials. This can make user B's request get sent over user A's
previously authenticated connection.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| curl | curl | unaffected |
|
No data.
No data.
No data available yet.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Sun, 06 Sep 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection. | |
| Title | Negotiate ambient user conn reuse | |
| References |
|
Subscriptions
No data.
MITRE
Status: PUBLISHED
Assigner: curl
Published:
Updated: 2026-09-06T17:47:43.523Z
Reserved: 2026-08-15T10:35:02.789Z
Link: CVE-2026-19931
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-06T18:17:20.733
Modified: 2026-09-06T18:17:20.733
Link: CVE-2026-19931
Redhat
No data.
OpenCVE Enrichment
No data.
No weakness.