Vulnerability in Crowcpp Crow
CVE-2026-116011
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.
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/CrowCpp/Crow/security/advisories/GHSA-7x84-xhp8-6cqj (vendor-advisory)
- github.com/CrowCpp/Crow/commit/6956b7ca93c5df22f5aaccd670e5aa000c0d882b (patch)
- github.com/CrowCpp/Crow/releases/tag/v1.3.4 (release-notes)
- github.com/CrowCpp/Crow/blob/v1.3.3/include/crow/json.h (technical-description)
- www.vulncheck.com/advisories/crow-before-1.3.4-denial-of-service-via-deeply-nes… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116011?
- CVE-2026-116011 is a high-severity vulnerability in Crowcpp Crow, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-10-24.
- How severe is CVE-2026-116011?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2026-116011 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.