Low3.7Red Hat & Ubuntu Linux

Information disclosure due to cookie leak when reusing connections with custom Host headers

CVE-2026-6276 Published Apr 29, 2026

CVE-2026-6276

Affected products & platforms

Red Hat & Ubuntu LinuxUnclassified

Summary

Information disclosure due to cookie leak when reusing connections with custom Host headers. Red Hat rates this low (CVSS 3.7). Weakness: CWE-346. Affected package(s): curl-main. Resolved in Red Hat advisory RHSA-2026:12916 — update the affected packages (`sudo dnf update`).

Affected versions

curl-main-8.20.0-0.1.hum1

Official advisory · high-confidence parse· fetched 6 hours ago·verify at source

Fixed versions

RHSA-2026:12916

Official advisory · high-confidence parse· fetched 6 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:12916 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 6 hours ago·verify at source

Discussion(0)

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