CVE-2026-3783
MEDIUMDescription
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.
How to fix
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 25% of all known CVEs.
References
Related Vulnerabilities
Other CWE-522 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2019-17662 | Critical | 9.8 | 97% | - | - |
| CVE-2020-29583 | Critical | 9.8 | 90% | KEV | - |
| CVE-2021-30116 | Critical | 10.0 | 86% | KEV + Ransom | Fix |
| CVE-2024-44000 | Critical | 9.8 | 83% | - | Fix |
| CVE-2018-9160 | Critical | 9.8 | 77% | - | - |
| CVE-2017-9248 | Critical | 9.8 | 75% | KEV | Fix |
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Markdown
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-12.