How severe is GHSA-m8j6-rc5x-wv36?

GHSA-m8j6-rc5x-wv36 has a CVSS score of 5.2/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by GHSA-m8j6-rc5x-wv36?

GHSA-m8j6-rc5x-wv36 affects the following packages: nono-py (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-m8j6-rc5x-wv36?

Update nono-py to 0.10.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m8j6-rc5x-wv36 is resolved across your whole dependency graph.

How do I detect GHSA-m8j6-rc5x-wv36 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nono-py, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-m8j6-rc5x-wv36 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-m8j6-rc5x-wv36 actively exploited in the wild?

No public exploit code has been indexed for GHSA-m8j6-rc5x-wv36 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-m8j6-rc5x-wv36 published, and has it been updated?

GHSA-m8j6-rc5x-wv36 was published on June 26, 2026 and was last updated on June 26, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍

🐍 PyPI

Not in CISA KEV

MEDIUM severity

nono-py's policy JSON accepts unknown security fieldsGHSA-m8j6-rc5x-wv36

MEDIUMFix: nolabs-ai/nono-py@2897ee2

GHSA-m8j6-rc5x-wv36 is a medium-severity (CVSS 5.2) vulnerability in nono-py. A fix is available for nono-py — see the affected versions and patch details below.

Published

Jun 26, 2026

Updated

Jun 26, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Jun 26, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐍nono-py

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`nono-py`	all versions	0.10.1`pip install --upgrade 'nono-py==0.10.1'`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nono-py, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nono-py to 0.10.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m8j6-rc5x-wv36 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### 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 d

O3 Security · Impact-Aware SCA

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