Summary
ckb: Large dep group requires a lot of resources to process but the cost to commit the transaction is very low.
Impact
When a transaction contains a dep group with many cells, the resources required to process it are not linear to the transaction size nor spent script cycles.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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In 0.43.3, nodes drop the transactions relayed to them when they contain a dep group with more than 64 cells. They do not ban peers who send them such transactions.
In 0.100, the consensus disallow transactions using a dep group with more than 64 cells. Peers relaying such transaction must be banned. Blocks committing such transactions must be rejected.
Frequently Asked Questions
- What is GHSA-9MFC-CHWF-7WHF? GHSA-9MFC-CHWF-7WHF is a medium-severity security vulnerability in ckb (rust), affecting versions < 0.43.3. It is fixed in 0.43.3.
- Which versions of ckb are affected by GHSA-9MFC-CHWF-7WHF? ckb (rust) versions < 0.43.3 is affected.
- Is there a fix for GHSA-9MFC-CHWF-7WHF? Yes. GHSA-9MFC-CHWF-7WHF is fixed in 0.43.3. Upgrade to this version or later.
- Is GHSA-9MFC-CHWF-7WHF exploitable, and should I be worried? Whether GHSA-9MFC-CHWF-7WHF is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-9MFC-CHWF-7WHF is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-9MFC-CHWF-7WHF? Upgrade
ckbto 0.43.3 or later.