SB2026051221 - Input validation error in Cpp-httplib

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Main Vulnerability Database SB2026051221

SB2026051221 - Input validation error in Cpp-httplib

Published: May 12, 2026

Security Bulletin ID SB2026051221
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Input validation error (CVE-ID: CVE-2026-45352)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper input validation in ChunkedDecoder::read_payload when parsing chunked Transfer-Encoding request bodies. A remote attacker can send a specially crafted HTTP request with a negative chunk-size value to cause a denial of service.

The issue can cause unbounded memory allocation and process termination when the server accepts chunked request bodies.


Remediation

Install update from vendor's website.

References