CVE-2020-37288 Vyper 0.1.0b10 before 0.2.3 Invalid Jump Destination via Return in Nested Loops
Medium 6.3
Published
Updated
Check this codebase for CVE-2020-37288 and fix it if it is affected.
What it is: CVE-2020-37288 is a medium-severity vulnerability in vyperlang vyper, published on 21 Oct 2026.
Exploitation: There is no known exploitation of CVE-2020-37288 in the wild and no public exploit code.
Affected packages and fixed versions:
- vyper (PyPI): affected from 0.1.0b10; fixed in 0.2.3
- vyper (PyPI): affected from 0.1.0b10; fixed in 0.2.3
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2020-37288/ (Markdown: https://insights.sbomify.com/CVE-2020-37288/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2020-37288?
CVE-2020-37288 is a medium-severity vulnerability in vyperlang vyper, published on 21 Oct 2026.
Official description
Vyper from 0.1.0b10 before 0.2.3 generates incorrect code for a return statement inside a for loop in an internal function called two or more internal calls deep, producing an invalid jump destination (stack underflow). Affected contracts revert such calls unnecessarily, which in limited circumstances could enable denial of service against public contracts.
Weakness: CWE-670
Which versions are affected by CVE-2020-37288?
2 open source packages ship an affected version, including vyper.
| Package | Affected | Fixed in |
|---|---|---|
vyper PyPI | From 0.1.0b10 | 0.2.3 |
vyper PyPI | From 0.1.0b10 | 0.2.3 |
How do I fix CVE-2020-37288?
Upgrade vyper to 0.2.3 or later.
Is CVE-2020-37288 being exploited?
There is no known exploitation of CVE-2020-37288 in the wild and no public exploit code.
Sources
Also known as GHSA-4c59-5jcg-7qq8, GHSA-vg88-3v92-rjx2.