CVEvulnerability
CVE-2026-3783
5.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2026-03-11
- Last modified
- 2026-09-15
- Assigner
- 2499f714-1537-4658-8207-48ae4bb9eae9
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-522
Description
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.
Affected configurations
• haxx curl (>= 7.33.0 < 8.19.0)
Related
Weakness · CWE (1)
- CWE-522 Insufficiently Protected Credentials weakness
References
- 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