PT-2026-44991 · Unknown · Cpp-Httplib

Published 2026-05-29 · Updated 2026-05-29 · CVE-2026-46527

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions cpp-httplib versions prior to 0.44.0

Description A denial of service occurs when the server uses the set trusted proxies() function with a non-empty trusted-proxy list. An attacker can send an HTTP request containing an X-Forwarded-For header with a value that parses to no valid IP segments. This triggers the get client ip() function to call front() on an empty std::vector, resulting in undefined behavior in C++ that typically leads to abnormal process termination.

Recommendations Update to version 0.44.0.

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-46527

Affected Products

Cpp-Httplib

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-46527 · Security Note
• https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-hg3g-vrg8-578g · Note
• https://twitter.com/VulmonFeeds/status/2060494471888855349 · Twitter Post
• https://twitter.com/CVEnew/status/2060470653996712140 · Twitter Post