CVE-2026-116011

high

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://www.vulncheck.com/advisories/crow-before-1.3.4-denial-of-service-via-deeply-nested-json-in-crow-json-load

https://github.com/CrowCpp/Crow/security/advisories/GHSA-7x84-xhp8-6cqj

https://github.com/CrowCpp/Crow/releases/tag/v1.3.4

https://github.com/CrowCpp/Crow/commit/6956b7ca93c5df22f5aaccd670e5aa000c0d882b

https://github.com/CrowCpp/Crow/blob/v1.3.3/include/crow/json.h#L878

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109269

Details

Source: Mitre, NVD

Published: 2026-10-24

Updated: 2026-10-24

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

CVSS v4

Base Score: 8.7

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

Severity: High