CVE-2026-9546
A vulnerability in libcurl caused the HTTP `Referer:` header to persist even when explicitly cleared. While the documentation states that pa
CVSS
7.5
High
EPSS
0.7%
p47
KEV
—
Exploit Today
14
0-100
Published: Jul 3, 2026 · Last modified: Jul 7, 2026
0.2%EPSS · 30 days0.7%
2026-07-042026-07-17
A vulnerability in libcurl caused the HTTP `Referer:` header to persist even when explicitly cleared. While the documentation states that passing NULL to `CURLOPT_REFERER` suppresses the header, the option failed to clear the internal state. As a result the previous referrer string was erroneously reused and sent in subsequent requests, potentially leaking sensitive information to unintended servers.
No related CVEs by CWE or product.