GHSA-m8j6-rc5x-wv36: Nono py Nono-py's Policy JSON Accepts Unknown Vulnerability

MODERATE
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CVSS 5.2
Published
Advisory Summary

GHSA-m8j6-rc5x-wv36 is a MODERATE (CVSS 5.2) nono-py's policy json accepts unknown vulnerability (General Security Weakness) affecting Nono py libraries in the PyPI ecosystem. The issue involves nono-py's policy json accepts unknown security fields. Remediation is available by upgrading affected packages to version 0.10.1.

GHSA-m8j6-rc5x-wv36 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-m8j6-rc5x-wv36
Severity MODERATE
CVSS v3.1 Base Score 5.2
CWE Classification General Security Weakness
Affected Product Nono py
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix GHSA-m8j6-rc5x-wv36

To remediate this vulnerability, upgrade all affected Nono py dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

nono-py fixed: 0.10.1 
pip install nono-py>=0.10.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show nono-py

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-m8j6-rc5x-wv36, inspect your installed packages using pip:

pip show nono-py

Analyze the terminal output to locate any version of Nono py in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.10.1), your application is affected.

Note: The pip show nono-py command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Nono py, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary nono-py policy handling could fail open in two ways. First, resolving a policy-derived `ProxyConfig` did not automatically enforce `CapabilitySet.proxy_only`, allowing sandboxed children to bypass a resolved domain allowlist by using direct network access. Second, policy JSON accepted unknown security-sensitive fields, so misspelled or unsupported restrictions could be silently ignored. ### Impact A sandboxed child may receive broader network access than the policy author intended. This can allow outbound requests outside the configured proxy allowlist and may expose sensitive data depending on the execution environment and workload. ### Older-kernel note On Linux kernels without Landlock ABI v4 network rules, patched versions continue to support proxy-only enforcement through the seccomp supervisor fallback introduced in 807fb4b. Users on older kernels should ensure policy-resolved proxy configurations are coupled to `CapabilitySet.proxy_only(proxy);` merely injecting proxy environment variables is not sufficient.

GHSA-m8j6-rc5x-wv36 Affected Nono py Versions

1 component(s)
Fixed Versions:
0.10.1
Product / Package Ecosystem Affected Versions Fixed Version
nono-py
pypi/nono-py
PyPI
< 0.10.1
0.10.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/always-further/nono-py/security/advisories/GHSA-m8j6-rc5x-wv36
Security Fix Commit FIX COMMIT
https://github.com/nolabs-ai/nono-py/commit/2897ee20df0d75afd298d94840b9d135b3b3a6e9
Security Fix Commit FIX COMMIT
https://github.com/nolabs-ai/nono-py/commit/807fb4bce2385b9e88185bf160e0792b588813c7
Nono py Source Repository REPOSITORY
https://github.com/always-further/nono-py

Frequently Asked Questions

What is GHSA-m8j6-rc5x-wv36?
GHSA-m8j6-rc5x-wv36 is a security vulnerability in Nono py involving nono-py's policy JSON accepts unknown security fields under General Security Weakness.
Which Nono py versions are affected?
Affected versions include releases prior to 0.10.1 across affected packages: nono-py.
What version fixes GHSA-m8j6-rc5x-wv36?
Upgrading to 0.10.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is nono-py affected?
Yes, nono-py is affected in releases prior to 0.10.1. Upgrade your dependency to 0.10.1 or later.
What is the CVSS score of GHSA-m8j6-rc5x-wv36?
GHSA-m8j6-rc5x-wv36 has a CVSS v3.1 base score of 5.2 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
What CWE is associated with GHSA-m8j6-rc5x-wv36?
GHSA-m8j6-rc5x-wv36 is classified under General Security Weakness.
How can I check PyPI dependencies for GHSA-m8j6-rc5x-wv36?
Run the dependency tree command: 'pip show nono-py'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m8j6-rc5x-wv36",
  "modified" : "2026-06-26T20:41:59Z",
  "published" : "2026-06-26T20:41:59Z",
  "aliases" : [ ],
  "summary" : "nono-py's policy JSON accepts unknown security fields",
  "details" : "### Summary\n\nnono-py policy handling could fail open in two ways. First, resolving a policy-derived `ProxyConfig` did not automatically enforce `CapabilitySet.proxy_only`, allowing sandboxed children to bypass a resolved domain allowlist by using direct network access. Second, policy JSON accepted unknown security-sensitive fields, so misspelled or unsupported restrictions could be silently ignored.\n\n### Impact\n\nA sandboxed child may receive broader network access than the policy author intended. This can allow outbound requests outside the configured proxy allowlist and may expose sensitive data depending on the execution environment and workload.\n\n### Older-kernel note\n\nOn Linux kernels without Landlock ABI v4 network rules, patched versions continue to support proxy-only enforcement through the seccomp supervisor fallback introduced in 807fb4b. Users on older kernels should ensure policy-resolved proxy configurations are coupled to `CapabilitySet.proxy_only(proxy);` merely injecting proxy environment variables is not sufficient.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "nono-py"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.10.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.10.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/always-further/nono-py/security/advisories/GHSA-m8j6-rc5x-wv36"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nolabs-ai/nono-py/commit/2897ee20df0d75afd298d94840b9d135b3b3a6e9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nolabs-ai/nono-py/commit/807fb4bce2385b9e88185bf160e0792b588813c7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/always-further/nono-py"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-26T20:41:59Z",
    "nvd_published_at" : null
  }
}