5.5

CVE-2020-26800: ethereum aleth Out-of-bounds Write

CVSS: 5.5v3.1MediumModified
Published 11-01-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-26800 is a medium (CVSS 5.5) Out-of-bounds Write vulnerability in ethereum aleth. EPSS estimates a 1.22% chance of exploitation in the next 30 days, higher than 68.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.22%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 11-01-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A stack overflow vulnerability in Aleth Ethereum C++ client version <= 1.8.0 using a specially crafted a config.json file may result in a denial of service.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.22%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

+0.01 pp

From 1.20% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Aleth

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Ethereum1 product

1 vendor · 1 product

References

3 links