What is CVE-2024-26149?

CVE-2024-26149 is a low-severity vulnerability in Vyperlang Vyper, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.7/10. Published 2024-02-26.

How severe is CVE-2024-26149?

Low severity. CVSS v3 base score is 3.7 out of 10.

Buffer overflow in Vyperlang Vyper

CVE-2024-26149

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. If an excessively large value is specified as the starting index for an array in `_abi_decode`, it can cause the read position to overflow. This results in the decoding of values outside the intended array bounds, potentially leading to exploitations in contracts that use arrays within `_abi_decode`. This vulnerability affects 0.3.10 and earlier versions.

Vulnerability class: Buffer Overflow

Published 2024-02-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (43.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Vyperlang Vyper — versions <= 0.3.10

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

github.com/vyperlang/vyper/security/advisories/GHSA-9p8r-4xp4-gw5w (Exploit, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2024-26149?: CVE-2024-26149 is a low-severity vulnerability in Vyperlang Vyper, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.7/10. Published 2024-02-26.
How severe is CVE-2024-26149?: Low severity. CVSS v3 base score is 3.7 out of 10.