Dashboard / CVE-2026-40070

CVE-2026-40070

HIGH
MEDIUM Priority: 0.01 BB Relevance: 66/100
Published: 2026-04-09 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: High
I: High
A: None

Description

BSV Ruby SDK is the Ruby SDK for the BSV blockchain. From 0.3.1 to before 0.8.2, BSV::Wallet::WalletClient#acquire_certificate persists certificate records to storage without verifying the certifier's signature over the certificate contents. In acquisition_protocol: 'direct', the caller supplies all certificate fields (including signature:) and the record is written to storage verbatim. In acquisition_protocol: 'issuance', the client POSTs to a certifier URL and writes whatever signature the response body contains, also without verification. An attacker who can reach either API (or who controls a certifier endpoint targeted by the issuance path) can forge identity certificates that subsequently appear authentic to list_certificates and prove_certificate.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
sgbett bsv-wallet 0.1.2 – 0.3.4
sgbett bsv_ruby_sdk 0.3.1 – 0.8.2

References & Advisories (5)

https://brc.dev/52
Not Applicable

Bug Bounty Relevance

66 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploitation Probability

0.14%
Raw Score 0.001350
Percentile 3.0%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00135
2026-10-28
0.00135

Intelligence Sources

nvd ref →

External Links