Uncontrolled Recursion Vulnerability in Crow Web Framework by CrowCpp
CVE-2026-116011

8.7HIGH

Key Information:

Vendor

Crowcpp

Status
Crow
Vendor
CVE Published:
24 October 2026

What is CVE-2026-116011?

The Crow Web Framework, prior to version 1.3.4, is susceptible to an uncontrolled recursion vulnerability within the crow::json::load() function. This flaw enables remote, unauthenticated attackers to send requests containing deeply nested JSON structures. By doing so, attackers can exhaust the worker thread stack, ultimately leading to server crashes. This vulnerability can significantly disrupt service availability by terminating processes and severing all active connections, thus posing a security risk for applications reliant on the Crow framework.

Affected Version(s)

Crow 0 < 1.3.4

References

https://github.com/CrowCpp/Crow/security/advisories/GHSA-...
vendor-advisory
https://github.com/CrowCpp/Crow/commit/6956b7ca93c5df22f5...
patch
https://github.com/CrowCpp/Crow/releases/tag/v1.3.4
release-notes

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

Credit

dread (d7ead)
.