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Vulnerabilities

Security fix · CVE-2020-37287

Vyper: Call stack corruption when passing complex type containing non-base type members as argument

Published Oct 6, 2026 · catalog updated Oct 24, 2026 · Vyper: Call stack corruption

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2020-37287. EPSS is 0.25%. Act only if a listed version of Vyper: Call stack corruption is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Vyper: Call stack corruption).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Advisory link
Affected products
PyPI vyper

### Impact When we pass a multi-dimensional array (like ) as an argument to internal/external functions we get incorrect output. This is due to a stack management issue, because it was assumed that the size of each subtype of an array/struct is 32, which is not always correct. Example code: Please see #2183 for further information ### Patches This problem was fixed in #2184, and released as a part of [ ](https://github.com/vyperlang/vyper/releases/tag/v0.2.6).

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • PyPI vyper0 → 0.2.6

How to fix CVE-2020-37287

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2020-37287. EPSS is 0.25%. Act only if a listed version of Vyper: Call stack corruption is installed.

Which versions are affected?

Compare what you have installed with 0 → 0.2.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-682. EPSS 0.25%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 6, 2026 · GitHub Advisory Database

    Detected

    ### Impact When we pass a multi-dimensional array (like ) as an argument to internal/external functions we get incorrect output. This is due to a stack management issue, because it was assumed that the size of each subtype of an array/struct is 32, which is not always correct. Example code: Please see #2183 for further information ### Patches This problem was fixed in #2184, and released as a part

  2. Oct 24, 2026 · GitHub Advisory Database

    Fix available

    vyper fixed in 0.2.6

  3. Oct 24, 2026 · GitHub Advisory Database

    Fix available

    vyper fixed in 0.2.6

  4. Oct 24, 2026 · GitHub Advisory Database

    Updated

    ### Impact When we pass a multi-dimensional array (like ) as an argument to internal/external functions we get incorrect output. This is due to a stack management issue, because it was assumed that the size of each subtype of an array/struct is 32, which is not always correct. Example code: Please see #2183 for further information ### Patches This problem was fixed in #2184, and released as a part

Sources

References

Freshness

Last verified in this catalog Oct 24, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • PyPA Advisory DatabaseOct 26, 2026
  • GitHub Advisory DatabaseOct 25, 2026
  • OpenSSF OSV / OSV ScannerOct 25, 2026
  • CVE.orgOct 24, 2026
  • FIRST EPSSOct 24, 2026