Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, When the server has called Server::set_trusted_proxies() with a non-empty trusted-proxy list, an attacker can send an HTTP request that includes an X-Forwarded-For header whose value parses to no valid IP segments. The code path then executes get_client_ip(), which calls front() on an empty std::vector—undefined behavior in C++. On typical implementations this manifests as abnormal process termination (denial of service). With Sanitizers enabled, you get an explicit runtime diagnostic. This vulnerability is fixed in 0.44.0.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-46527 Denial of Service in cpp-httplib Prior to 0.44.0 via X-Forwarded-For Header https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-46527
Post summary
CVE-2026-46527 exposes a Denial of Service flaw in cpp-httplib (pre‑0.44.0) that can be triggered through the X‑Forwarded‑For header.
CVE-2026-46527 cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, When the server has called Server::set_trusted_proxies() with a non… https://www.cve.org/CVERecord?id=CVE-2026-46527
Post summary
The entry reports that CVE-2026-46527 exists in cpp‑httplib before version 0.44.0 due to a flaw in handling trusted proxies, with no evidence of exploitation or remediation.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | yhirose | cpp-httplib | - | - | - |