CVE-2026-116011

HIGH 7.5

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

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-674
Vendor	crowcpp
Product	crow
Published	Oct 24, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

CrowCpp / Crow

0 < 1.3.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

dread (d7ead)