When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer
performs a redirect to a second URL, curl could leak that token to the second
hostname under some circumstances.
If the hostname that the first request is redirected to has information in the
used .netrc file, with either of the `machine` or `default` keywords, curl
would pass on the bearer token set for the first host also to the second one.
References
| Link | Resource |
|---|---|
| https://curl.se/docs/CVE-2026-3783.html | Patch Vendor Advisory |
| https://curl.se/docs/CVE-2026-3783.json | Vendor Advisory |
| https://hackerone.com/reports/3583983 | Exploit Issue Tracking Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2026/03/11/2 | Mailing List Third Party Advisory |
Configurations
History
12 Mar 2026, 14:10
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Haxx curl
Haxx |
|
| CPE | cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* | |
| References | () https://curl.se/docs/CVE-2026-3783.html - Patch, Vendor Advisory | |
| References | () https://curl.se/docs/CVE-2026-3783.json - Vendor Advisory | |
| References | () https://hackerone.com/reports/3583983 - Exploit, Issue Tracking, Third Party Advisory | |
| References | () http://www.openwall.com/lists/oss-security/2026/03/11/2 - Mailing List, Third Party Advisory |
11 Mar 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.3 |
| CWE | CWE-522 |
11 Mar 2026, 11:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-03-11 11:16
Updated : 2026-03-12 14:10
NVD link : CVE-2026-3783
Mitre link : CVE-2026-3783
CVE.ORG link : CVE-2026-3783
JSON object : View
Products Affected
haxx
- curl
CWE
CWE-522
Insufficiently Protected Credentials