Denial of Service Vulnerability in C++11 HTTP/HTTPS Library by yhirose
CVE-2026-22776

8.7HIGH

Key Information:

Vendor

Yhirose

Status
Cpp-httplib
Vendor
CVE Published:
12 January 2026

What is CVE-2026-22776?

The cpp-httplib library, a single-file header-only library for C++11, is susceptible to a Denial of Service vulnerability due to improper handling of compressed HTTP request bodies. Prior to version 0.30.1, the library fails to restrict the size of decompressed data, allowing attackers to exploit this issue by sending specially crafted requests. This can lead to excessive memory consumption and service disruption, impacting the availability of affected applications.

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Affected Version(s)

cpp-httplib < 0.30.1

References

https://github.com/yhirose/cpp-httplib/security/advisorie...
x_refsource_CONFIRM
https://github.com/yhirose/cpp-httplib/commit/2e2e47bab1a...
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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