Insufficiently Protected Credentials Affecting curl package, versions [7.33.0,8.19.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-CURL-15460439
- published11 Mar 2026
- disclosed11 Mar 2026
- creditspectreglobalsec
Introduced: 11 Mar 2026
CVE-2026-3783 (opens in a new tab)How to fix?
Upgrade curl to version 8.19.0 or higher.
Overview
curl is a command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP. libcurl offers a myriad of powerful features.
Affected versions of this package are vulnerable to Insufficiently Protected Credentials which can be leaked from output_auth_headers() when redirecting with an OAuth2 bearer token. If a hostname that is the target of a redirect matches an entry in the .netrc file with either the machine or default keywords, the data from the first host can be forwarded in the bearer token to the second host.