CVE-2026-86413None▾ SunlitWhen using an *ambient user* in a first transfer doing Negotiate authentication and asked to follow redirects, curl could pass on its credential details to an unrelated second origin when asked to redirect there.
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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When using an ambient user in a first transfer doing Negotiate authentication and asked to follow redirects, curl could pass on its credential details to an unrelated second origin when asked to redirect there.
curl >= 8.22.0 <= 8.22.0curl >= 8.21.0 <= 8.21.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-87861Nonecross-origin reuse of a Negotiate connection
CVE-2026-86415Noneauto client cert connection reuse mixup
CVE-2026-86414Noneleaking host credentials to HTTP proxy
CVE-2026-87863NoneHSTS response erases persisted entries
CVE-2026-87862NoneHSTS cache import drops longer-lived child
CVE-2026-86409Nonestale SigV4 headers sent unintended