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High-risk vulnerability digests

CVE-2026-6253

  • UNKNOWN

proxy credentials leak over redirect-to proxy

Details

Affected versions
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Summary
curl might erroneously pass on credentials for a first proxy to a second proxy. This can happen when the following conditions are true: 1. curl is setup to use specific different proxies for different URL schemes 2. the first proxy needs credentials 3. the second proxy uses no credentials 4. while using the first proxy (using say `http://`), curl is asked to follow a redirect to a URL using another scheme (say `https://`), accessed using a second, different, proxy
Remediation
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Exploit info
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Information is aggregated from multiple authoritative sources for convenience; verify with NVD and vendors before operational decisions.