CVE-2020-37288

Vyper 0.1.0b10 before 0.2.3 Invalid Jump Destination via Return in Nested Loops

State: Published
Severity: 6.3 Medium
Published: Oct 21, 2026
Updated: Oct 21, 2026
Reserved: Oct 20, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	VulnCheck
3.1	3.7 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L	VulnCheck

Weaknesses

CWE-670 Always-Incorrect Control Flow Implementation

Affected Products

Product	Versions
vypervyperlang	0.1.0b10 to before 0.2.3Affected 0.2.3Not affected

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 Loopsthird-party-advisory

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