CVE-2026-3783
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 products
- Ibm Aix, Linuxmint, Apple Macos, Red Os, Rocky Linux, Ubuntu, Curl
- Haxx Curl
- < 8.19.0
- CVSS 3.1
- 5.3 MEDIUM
- EPSS
- 0.3% (26th percentile)
- Weakness
- CWE-522
- NVD status
- Analyzed
- Published
- 2026-03-11
CVE-2026-3783 at NVD
No indexed exploits for CVE-2026-3783 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-3783 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.