CVE-2026-116011 PUBLISHED

Crow before 1.3.4 Denial of Service via Deeply Nested JSON in crow::json::load()

Assigner: VulnCheck
Reserved: 24.10.2026 Published: 24.10.2026 Updated: 24.10.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	CrowCpp
Product	Crow
Versions	Default: unaffected affected from 0 to 1.3.4 (excl.)

CVE-2026-116011 PUBLISHED

Crow before 1.3.4 Denial of Service via Deeply Nested JSON in crow::json::load()

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Product Status

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Problem Types