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CVE-2026-82358 medium CVSS 6.5

Authorization Flaw in RT-Labs AB C-Open CANopen (CVE-2026-82358)

Summary

Vulnerability in RT-Labs AB C-Open CANopen (CVE-2026-82358). Data can be tampered with by attackers. Mitigation: upgrade to 1.1.1 or later.

Original description

The description as published by the source.

RT-Labs AB C-Open CANopen contains a write protection bypass in the SDO (Service Data Object) server implementation 'src/co_sdo_server.c' that fails to properly validate write permissions when processing download-segment frames. An unauthenticated attacker on the CAN bus can initiate an SDO upload for a read-only Object Dictionary (OD) entry, which sets a data pointer to the read-only object, then send download-segment frames to write to that memory location. The download-segment handler does not verify that a download session is active, allowing any CANopen node to overwrite read-only OD entries using two SDO frames. Note that CANopen protocol operates over CAN bus and does not provide built-in authentication mechanisms. Fixed in 1.1.1.

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-82358 has been found in RT-Labs AB C-Open CANopen.
Data can be tampered with by attackers. CVSS score: 6.5/10.
What to do: upgrade RT-Labs AB C-Open CANopen to 1.1.1 or later.
If unsure, ask your IT team or search "RT-Labs AB C-Open CANopen CVE-2026-82358" on the vendor's site.

CVE-2026-82358 (RT-Labs AB C-Open CANopen) — CWE-863 / CVSS v3 6.5
Attack vector: adjacent-network / unauthenticated / no user interaction
Patched: 1.1.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Incorrect authorization (CWE-863) exists in RT-Labs AB C-Open CANopen.

📍 Affected scope

Check the vendor advisory for the affected versions of RT-Labs AB C-Open CANopen.

🔥 Severity

Severity: Medium (CVSS 6.5/10). Data can be tampered with by attackers.

🔧 How to fix

Update to 1.1.1.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで RT-Labs AB C-Open CANopen を使っているサービスとバージョンを洗い出す。

  2. 2
    Apply patch patch 
    Upgrade RT-Labs AB C-Open CANopen to 1.1.1

    ステージング環境で 1.1.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

References

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