# CVE-2026-57120: PraisonAI: execute_code sandbox bypass: str.format C-level attribute access reads every blocklisted dunder

> Attackers can bypass sandbox restrictions in PraisonAI to read sensitive internal attributes via string formatting when auto-approval is enabled.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-pv2j-rghr-v5r9, PYSEC-2026-3533

## What is CVE-2026-57120?

CVE-2026-57120 is a medium-severity code injection vulnerability in MervinPraison praisonaiagents, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.59, execute_code sandbox mode permits runtime assembly of blocklisted dunder names and allows str.format or str.format_map to resolve dotted fields through C-level attribute access that bypasses _safe_getattr. This exposes class, qualified-name, base-class, globals, and object-dictionary attributes to prompt-influenced code when approval is automatically granted, producing a high-impact read primitive without establishing a complete in-process execution chain. This issue is fixed in praisonaiagents 1.6.59.

Weakness: CWE-693 (Protection Mechanism Failure)

## Which versions are affected by CVE-2026-57120?

3 open source packages ship an affected version, including praisonaiagents.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `praisonaiagents` | PyPI | All versions | 1.6.59 |
| `praisonaiagents` | PyPI | All versions | 1.6.59 |
| `praisonaiagents` | PyPI | All versions | 1.6.59 |

## How do I fix CVE-2026-57120?

Upgrade praisonaiagents to 1.6.59 or later.

## Is CVE-2026-57120 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57120 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-57120 and fix it if it is affected.

What it is: CVE-2026-57120 is a medium-severity code injection vulnerability in MervinPraison praisonaiagents, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57120 exists.

Affected packages and fixed versions:
- praisonaiagents (PyPI): affected all versions; fixed in 1.6.59
- praisonaiagents (PyPI): affected all versions; fixed in 1.6.59
- praisonaiagents (PyPI): affected all versions; fixed in 1.6.59

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-57120/ (Markdown: https://insights.sbomify.com/CVE-2026-57120/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-57120
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-57120
- OSV: https://osv.dev/vulnerability/CVE-2026-57120

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-57120/
Summaries are generated and may contain mistakes; the official description above is the record.