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CVE-2026-6276

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CVE-2026-6276

Published: May 13, 2026

Modified: May 13, 2026

PUBLISHED

Description

Using libcurl, when a custom `Host:` header is first set for an HTTP request and a second request is subsequently done using the same *easy handle* but without the custom `Host:` header set, the second request would use stale information and pass on cookies meant for the first host in the second request. Leak them.

VendorProductVersions

curl

curl

affected
8.19.0 - <= 8.19.0
affected
8.18.0 - <= 8.18.0
affected
8.17.0 - <= 8.17.0
affected
8.16.0 - <= 8.16.0
affected
8.15.0 - <= 8.15.0

+48 more versions

References

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