Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-40070— bsv-sdk and bsv-wallet persist unverified certifier signatures in acquire_certificate (direct and issuance paths)

Quick assessment

Affected
sgbett bsv-ruby-sdk
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BSV Ruby SDK是Simon Bettison个人开发者的一个BSV区块链的Ruby开发工具包。 BSV Ruby SDK 0.3.1至0.8.2之前版本存在数据伪造问题漏洞，该漏洞源于存储证书记录时未验证签名，可能导致攻击者伪造身份证书。

CVSS 8.1 · High EPSS 0.20% · P9
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-40070

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
bsv-sdk and bsv-wallet persist unverified certifier signatures in acquire_certificate (direct and issuance paths)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
BSV Ruby SDK 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BSV Ruby SDK是Simon Bettison个人开发者的一个BSV区块链的Ruby开发工具包。 BSV Ruby SDK 0.3.1至0.8.2之前版本存在数据伪造问题漏洞，该漏洞源于存储证书记录时未验证签名，可能导致攻击者伪造身份证书。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sgbett bsv-ruby-sdk >= 0.3.1, < 0.8.2 -
sgbett bsv-sdk >= 0.3.1, < 0.8.2 -
sgbett bsv-wallet >= 0.1.2, < 0.3.4 -

II. Public POCs for CVE-2026-40070

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9079 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-40070

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-40070 (1)

Vendor Advisories for CVE-2026-40070 (1)

Other References for CVE-2026-40070 (1)

IV. Related Vulnerabilities

Same product: bsv-ruby-sdk
Same vendor: sgbett
Same weakness: CWE-347

V. Comments for CVE-2026-40070

No comments yet

Leave a comment