Nethermind Juno Potential Denial of Service (DoS) via Integer OverflowGHSA-wq32-8rp4-w2mc
HIGHFix: NethermindEth/juno@5107487GHSA-wq32-8rp4-w2mc is a high-severity (CVSS 7.5) CWE-190 vulnerability in github.com/NethermindEth/juno. A fix is available for github.com/NethermindEth/juno — see the affected versions and patch details below.
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 GHSA-wq32-8rp4-w2mc.
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
github.com/NethermindEth/junoReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
An integer overflow in Nethermind Juno before v0.12.5 within the Sierra bytecode decompression logic within the "cairo-lang-starknet-classes" library could allow remote attackers to trigger an infinite loop (and high CPU usage) by submitting a malicious Declare v2/v3 transaction. This results in a denial-of-service condition for affected Starknet full-node implementations.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/NethermindEth/juno | all versions | 0.12.5go get github.com/NethermindEth/juno@v0.12.5 |
Affected Products
junonethermindDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/NethermindEth/juno, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/NethermindEth/juno to 0.12.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wq32-8rp4-w2mc is resolved across your whole dependency graph.
Workarounds
Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.
Frequently Asked Questions
Is GHSA-wq32-8rp4-w2mc in your dependencies?
Find it across Go, including transitive dependencies.