CVE-2023-51075 is a high-severity (CVSS 7.5) CWE-835 vulnerability in cn.hutool:hutool-core. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for cn.hutool:hutool-core — see the affected versions and patch details below.
hutool-core discovered to contain an infinite loop in the StrSplitter.splitByRegex function
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-51075.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
cn.hutool:hutool-coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
hutool-core v5.8.23 was discovered to contain an infinite loop in the StrSplitter.splitByRegex function. This vulnerability allows attackers to cause a Denial of Service (DoS) via manipulation of the first two parameters.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | cn.hutool:hutool-core | all versions | 5.8.24cn.hutool:hutool-core:5.8.24 |
Affected Products
hutoolhutoolResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cn.hutool:hutool-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update cn.hutool:hutool-core to 5.8.24 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-51075 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
Frequently Asked Questions
Is CVE-2023-51075 in your dependencies?
Find it across Maven, including transitive dependencies.