Vyper: reversed order of side effects for some operations

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0049, the 42nd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 4 Sept 2023. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-g2xh-c426-v8mf
• OSV: GHSA-g2xh-c426-v8mf
• github.com/vyperlang/vyper/security/advisories/GHSA-g2xh-c426-v8mf
• nvd.nist.gov/vuln/detail/CVE-2023-40015
• github.com/vyperlang/vyper/issues/3604
• github.com/vyperlang/vyper/issues/4019
• github.com/vyperlang/vyper/pull/4157
• github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2023-167.yaml
• github.com/vyperlang/vyper

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.