Vulnerability-Lookup

CVE-2026-47128 (GCVE-0-2026-47128)

Vulnerability from cvelistv5 – Published: 2026-07-20 21:46 – Updated: 2026-07-21 12:56

Title

nono: Sandbox escape on Linux via D-Bus: `systemd-run --user`

Summary

nono is software that allows users to run AI agents in a zero-latency sandbox. Prior to version 0.55.0, the nono Landlock/seccomp policies allow access to local Unix domain sockets (concrete and abstract). This allows an easy sandbox escape by talking to the per-user systemd dbus socket. Version 0.55.0 patches the issue.

Severity

6.1 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/nolabs-ai/nono/security/adviso…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
always-further	nono	Affected: < 0.55.0

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-47128

Vulnerability from fkie_nvd - Published: 2026-07-20 22:17 - Updated: 2026-07-23 18:14

Severity

6.1 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/nolabs-ai/nono/security/advisories/GHSA-27vp-2mmc-vmh3
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/nolabs-ai/nono/security/advisories/GHSA-27vp-2mmc-vmh3

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "nono",
          "vendor": "always-further",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.55.0"
            }
          ]
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      "source": "security-advisories@github.com"
    }
  ],
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    {
      "lang": "en",
      "value": "nono is software that allows users to run AI agents in a zero-latency sandbox. Prior to version 0.55.0, the nono Landlock/seccomp policies allow access to local Unix domain sockets (concrete and abstract). This allows an easy sandbox escape by talking to the per-user systemd dbus socket. Version 0.55.0 patches the issue."
    }
  ],
  "id": "CVE-2026-47128",
  "lastModified": "2026-07-23T18:14:09.843",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 6.1,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L",
          "version": "3.1"
        },
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        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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    },
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}

GHSA-27VP-2MMC-VMH3

Vulnerability from github – Published: 2026-05-28 19:55 – Updated: 2026-05-28 19:55

Summary

nono: Sandbox escape on Linux via D-Bus: `systemd-run --user`

Details

Summary

The nono Landlock/seccomp policies allow access to local Unix domain sockets (concrete and abstract). This allows an easy sandbox escape by talking to the per-user systemd dbus socket.

Threat scenario: Running Aider, Claude Code, OpenCode or similar tools with "allow bash" policy so that it can invoke arbitrary host tools like make, gcc, etc. to write code.

Reproducer

Here, instead of running a tool like opencode or claude one can just invoke systemd-run, but this is something an agent could be tricked into doing:

$ cd ~/src/myproject
$ nono run -s --allow-cwd --profile claude-code -- \
      systemd-run --user -q --wait --collect \
      /bin/sh -c "echo oops > ~/Documents/escaped.txt"
$ cat /var/home/test/Documents/escaped.txt
oops
$

Impact

Complete sandbox escape. The unsandboxed sibling process can write anywhere the user can write, spawn arbitrary processes with network access, etc.

Maintainer Context

This issue allows a process running inside the sandbox to escape confinement by interacting with local user-scoped IPC mechanisms and regain the authority already held by the invoking user or service account.

The issue impacts the sandbox’s confinement and blast-radius reduction guarantees for agents and sandboxed tooling. However, exploitation does not provide privilege escalation, cross-user access, or host compromise beyond the permissions already available to the launcher outside the sandbox.

This issue affects the CLI policy layer and bundled sandbox profiles. The underlying core library nono does not ship with policy definitions or agent-facing confinement profiles by default, nor do the language SDKs.

This is considered a serious issue because an AI agent or untrusted command stream operating within the sandbox could abuse the bypass to perform unauthorized or destructive actions using the delegated authority of the launching user.

The root cause was incomplete mediation of local Unix domain socket access within affected sandbox policies. Support for restricting this behavior has since been added and the fix is available in the repository pending release.

CVSS rationale: exploitation requires execution within a locally launched sandboxed process using the authority already delegated by the invoking user or service account (AV:L/PR:L). The issue allows reliable bypass of sandbox confinement and policy guarantees, resulting in high integrity impact (I:H) and limited availability impact (A:L) through destructive actions within the launcher’s existing permissions. However, the issue does not provide privilege escalation, cross-user access, or a change in security scope (S:U).

Severity

6.1 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "nono-cli"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.55.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47128"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-28T19:55:40Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nThe nono Landlock/seccomp policies allow access to local Unix domain sockets (concrete and abstract). This allows an easy sandbox escape by talking to the per-user systemd dbus socket.\n\nThreat scenario: Running Aider, Claude Code, OpenCode or similar tools with \"allow bash\" policy so that it can invoke arbitrary host tools like `make`, `gcc`, etc. to write code.\n\n### Reproducer\n\nHere, instead of running a tool like `opencode` or `claude` one can just invoke `systemd-run`, but this is something an agent could be tricked into doing:\n\n```bash\n$ cd ~/src/myproject\n$ nono run -s --allow-cwd --profile claude-code -- \\\n      systemd-run --user -q --wait --collect \\\n      /bin/sh -c \"echo oops \u003e ~/Documents/escaped.txt\"\n$ cat /var/home/test/Documents/escaped.txt\noops\n$\n```\n\n### Impact\n\nComplete sandbox escape. The unsandboxed sibling process can write anywhere the user can write, spawn arbitrary processes with network access, etc.\n\n### Maintainer Context\n\nThis issue allows a process running inside the sandbox to escape confinement by interacting with local user-scoped IPC mechanisms and regain the authority already held by the invoking user or service account.\n\nThe issue impacts the sandbox\u2019s confinement and blast-radius reduction guarantees for agents and sandboxed tooling. However, exploitation does not provide privilege escalation, cross-user access, or host compromise beyond the permissions already available to the launcher outside the sandbox.\n\nThis issue affects the CLI policy layer and bundled sandbox profiles. The underlying core library `nono` does not ship with policy definitions or agent-facing confinement profiles by default, nor do the language SDKs.\n\nThis is considered a serious issue because an AI agent or untrusted command stream operating within the sandbox could abuse the bypass to perform unauthorized or destructive actions using the delegated authority of the launching user.\n\nThe root cause was incomplete mediation of local Unix domain socket access within affected sandbox policies. Support for restricting this behavior has since been added and the fix is available in the repository pending release.\n\nCVSS rationale: exploitation requires execution within a locally launched sandboxed process using the authority already delegated by the invoking user or service account (`AV:L/PR:L`). The issue allows reliable bypass of sandbox confinement and policy guarantees, resulting in high integrity impact (`I:H`) and limited availability impact (`A:L`) through destructive actions within the launcher\u2019s existing permissions. However, the issue does not provide privilege escalation, cross-user access, or a change in security scope (`S:U`).",
  "id": "GHSA-27vp-2mmc-vmh3",
  "modified": "2026-05-28T19:55:40Z",
  "published": "2026-05-28T19:55:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/always-further/nono/security/advisories/GHSA-27vp-2mmc-vmh3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/always-further/nono"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nono: Sandbox escape on Linux via D-Bus: `systemd-run --user`"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-47128 (GCVE-0-2026-47128)

FKIE_CVE-2026-47128

GHSA-27VP-2MMC-VMH3

Summary

Reproducer

Impact

Maintainer Context

Tags

Sightings

Nomenclature