Vulnerability · Published Oct 21, 2026 · Assigned by VulnCheck

CVE-2020-37288Vyper 0.1.0b10 before 0.2.3 Invalid Jump Destination via Return in Nested Loops

Low 3.7

In plain English

A low-severity security flaw in vyper from vyperlang. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.3%top 71.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	vyper	0.2.3	GHSA-vg88-3v92-rjx2

Affected products (as reported)

Vendor	Product	Versions
vyperlang	vyper	0.1.0b10 – before 0.2.3

Weakness: CWE-670 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References

GitHub Security Advisory (GHSA-vg88-3v92-rjx2) vendor-advisory
VulnCheck Advisory: Vyper 0.1.0b10 before 0.2.3 Invalid Jump Destination via Return in Nested Loops third-party-advisory