SB2026030913 - Multiple vulnerabilities in Cpp-httplib

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Improper handling of highly compressed data (CVE-ID: CVE-2026-28435)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the application does not enforce Server::set_payload_max_length() on the decompressed request body when using HandlerWithContentReader. A remote attacker can supply a specially crafted gzip data to the application and consume all available CPU and memory resources leading to a denial of service condition.

2) Information disclosure (CVE-ID: CVE-2026-28434)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the library outputs error handling messages in HTTP responses. A remote attacker can send a specially crafted HTTP request and gain access to sensitive information.

Remediation

Install update from vendor's website.

References

• https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xvfx-w463-6fpp
• https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-8mpw-r4gc-xm7q