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 seco…
High CVSS 7.5
Summary
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.
In-depth triage
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- :
Sources
- NVD DATABASE
Original Links
- https://curl.se/docs/CVE-2026-6276.html Patch
- https://curl.se/docs/CVE-2026-6276.json Product
- https://hackerone.com/reports/3671818 Exploit
- http://www.openwall.com/lists/oss-security/2026/04/29/13 Mailing List
- https://hackerone.com/reports/3671818 Exploit
Timeline
- nvd_ingest NVD