Authorization: Negotiate sent to foreign origin
Summary
| CVE | CVE-2026-94265 |
|---|---|
| State | PUBLISHED |
| Assigner | curl |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-20 21:17:22 UTC |
| Updated | 2026-10-20 21:17:22 UTC |
| Description | When processing an HTTP redirect to a URL containing userinfo (a `username:password` component), curl might erroneously retain and re-transmit the original host's HTTP Negotiate authentication state. Consequently, a malicious server can trigger a redirect containing arbitrary userinfo to force curl to send a freshly minted Kerberos ticket—generated using the ambient identity of the client process to an untrusted third-party host, effectively bypassing the domain-scoping restrictions normally enforced by the absence of `--location-trusted`. |
Risk And Classification
Problem Types: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| curl.se/docs/CVE-2026-94265.json | 2499f714-1537-4658-8207-48ae4bb9eae9 | curl.se | |
| curl.se/docs/CVE-2026-94265.html | 2499f714-1537-4658-8207-48ae4bb9eae9 | curl.se | |
| hackerone.com/reports/4040551 | 2499f714-1537-4658-8207-48ae4bb9eae9 | hackerone.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Joshua Rogers (Aisle Research) (en)
CNA: Joshua Rogers (Aisle Research) (en)
There are currently no legacy QID mappings associated with this CVE.