CVE-2026-116011

Description

Crow before 1.3.4 contains an uncontrolled recursion vulnerability in crow::json::load() that allows remote unauthenticated attackers to crash the server by sending deeply nested JSON. Attackers can send a request body with thousands of nested objects to exhaust the worker thread stack, terminating the process and dropping all connections.

References

• https://github.com/CrowCpp/Crow/blob/v1.3.3/include/crow/json.h#L878
• https://github.com/CrowCpp/Crow/commit/6956b7ca93c5df22f5aaccd670e5aa000c0d882b
• https://github.com/CrowCpp/Crow/releases/tag/v1.3.4
• https://github.com/CrowCpp/Crow/security/advisories/GHSA-7x84-xhp8-6cqj
• https://www.vulncheck.com/advisories/crow-before-1.3.4-denial-of-service-via-deeply-nested-json-in-crow-json-load