Vulnerability in pyspector (CVE-2026-41206)
Summary
Vulnerability in pyspector (CVE-2026-41206). Risk of unauthorized operations or information disclosure. Exploitable via PluginSecurity.validate_plugin_code. Mitigation: upgrade to 0.1.8 or later.
Original description
The description as published by the source.
Summary
The plugin security validator in PySpector uses AST-based static analysis to prevent dangerous code from being loaded as plugins. The blocklist implemented in PluginSecurity.validate_plugin_code is incomplete and can be bypassed using several Python constructs that are not checked. An attacker who can supply a plugin file can achieve arbitrary code execution within the PySpector process when that plugin is installed and executed.
Details
The validator maintains a set called fatal_calls that enumerates explicitly forbidden function names and attribute access patterns such as eval, exec, os.system, and subprocess.Popen. However, this approach relies on an exhaustive blocklist of known-dangerous identifiers, which is inherently incomplete.
The following bypass techniques are not detected by the current implementation:
importlib.import_module is not in fatal_calls and is not treated as a dangerous module, so it can be used to load os, subprocess, or any other module at runtime without triggering the validator.
Dynamic attribute chains using __class__.__mro__ and related dunder attributes allow traversal of the class hierarchy to reach arbitrary built-in functions without naming them directly in the source.
ctypes is not blocked and can be used to call native library functions including system.
__builtins__ dictionary access exposes all built-in callables without using the names that the validator checks.
types.CodeType allows constructio…
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
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-2026-41206 has been found in pyspector.
Attackers can target a specific entry point like PluginSecurity.validate_plugin_code over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade pyspector to 0.1.8 or later.
If unsure, ask your IT team or search "pyspector CVE-2026-41206" on the vendor's site.
CVE-2026-41206 (pyspector) — CWE-184
Attack surface: PluginSecurity.validate_plugin_code / fatal_calls / os.system / subprocess.Popen
Patched: 0.1.8 — 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.
A vulnerability (CWE-184) exists in pyspector. Attackers reach the vulnerable code path via PluginSecurity.validate_plugin_code.
Check the vendor advisory for the affected versions of pyspector. Attack surface: PluginSecurity.validate_plugin_code / fatal_calls / os.system / subprocess.Popen.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 0.1.8.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'pyspector' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'pyspector' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
pyspectorを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade pyspector to 0.1.8ステージング環境で 0.1.8 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。
-
3Post-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。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com