NULL Pointer Dereference Affecting cpp-httplib package, versions [,0.44.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published30 May 2026
- disclosed29 May 2026
- credit73Lab
Introduced: 29 May 2026
NewCVE-2026-46527 (opens in a new tab)How to fix?
Upgrade cpp-httplib to version 0.44.0 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference in the get_client_ip process when the server is configured with trusted proxies and receives a specially crafted X-Forwarded-For header that parses to no valid IP segments. An attacker can cause abnormal process termination or undefined behavior by sending such a request. This is only exploitable if the server is configured with a non-empty trusted-proxy list.