CVE-2024-47829 — pnpm
MEDIUMCVE-2024-47829 is a medium-severity (CVSS 6.5) CWE-328 vulnerability in pnpm. A fix is available for pnpm — see the affected versions and patch details below.
pnpm uses the md5 path shortening function causes packet paths to coincide, which causes indirect packet overwriting
Exploitation Status
No confirmed exploitation observed yet
- 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-2024-47829.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2024-47829 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,636 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
pnpmnpmDescription
The path shortening function is used in pnpm：
export function depPathToFilename (depPath: string, maxLengthWithoutHash: number): string {
let filename = depPathToFilenameUnescaped(depPath).replace(/[\\/:*?"<>|]/g, '+')
if (filename.includes('(')) {
filename = filename
.replace(/\)$/, '')
.replace(/(\)\()|\(|\)/g, '_')
}
if (filename.length > maxLengthWithoutHash || filename !== filename.toLowerCase() && !filename.startsWith('file+')) {
return `${filename.substring(0, maxLengthWithoutHash - 27)}_${createBase32Hash(filename)}`
}
return filename
}
However, it uses the md5 function as a path shortening compression function, and if a collision occurs, it will result in the same storage path for two different libraries. Although the real names are under the package name /node_modoules/, there are no version numbers for the libraries they refer to.
In the diagram, we assume that two packages are called packageA and packageB, and that the first 90 digits of their package names must be the same, and that the hash value of the package names with versions must be the same. Then C is the package that they both reference, but with a different version number. (npm allows package names up to 214 bytes, so constructing such a collision package name is obvious.)
Then hash([email protected])=hash([email protected]). This results in the same path for the installation, and thus under the same directory. Although the package names under node_modoules are the full paths again, they are shared with C. What is the exact version number of C? In our local tests, it depends on which one is installed later. If packageB is installed later, the C version number will change to 2.0.0. At this time, although package A requires the [email protected] version, package. json will only work during installation, and will not affect the actual operation. We did not receive any installation error issues from pnpm during our local testing, nor did we use force, which is clearly a case that can be triggered.
For a package with a package name + version number longer than 120, another package can be constructed to introduce an indirect reference to a lower version, such as one with some known vulnerability. Alternatively, it is possible to construct two packages with more than 120 package names + version numbers. This is clearly an advantage for those intent on carrying out supply chain attacks.
The solution: The repair cost is also very low, just need to upgrade the md5 function to sha256.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | pnpm | all versions | 10.0.0npm install pnpm@10.0.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pnpm, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update pnpm to 10.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-47829 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2024-47829 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2024-47829. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2024-47829 in your dependencies?
O3 Security finds CVE-2024-47829 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.