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🐍 PyPI

GHSA-ffv6-jj46-x367

MEDIUM

django-unicorn affected by component state manipulation via unvalidated attribute access

Also known asCVE-2026-31815
Published
Mar 11, 2026
Updated
Mar 13, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk11th percentile+0.11%
0.00%0.24%0.47%0.71%0.1%0.1%0.1%0.2%Apr 26Jun 26Jun 26

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

1 pkg affected
🐍django-unicorn

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

Component state manipulation is possible in django-unicorn due to missing access control checks during property updates and method calls. An attacker can bypass the intended _is_public protection to modify internal attributes such as template_name or trigger protected methods.

Vulnerability Details: Component Access Control Bypass

Security analysis identified that the framework fails to enforce visibility boundaries defined by _is_public within the action parsers. Specifically, the logic in set_property_value() and _call_method_name() utilizes getattr and setattr directly on component instances without verifying if the target attribute or method is explicitly marked as public.

Vulnerability resides in:

  • src/django_unicorn/views/action_parsers/call_method.py
  • src/django_unicorn/views/action_parsers/utils.py

While Django's template engine restricts rendering to registered directories, an unauthorized user can still force a component to render sensitive templates (e.g., admin layouts) from other installed applications or reset the component state by invoking the internal reset() method.

Proof of Concept (PoC)

Attacker can overwrite the template_name attribute by sending a crafted JSON payload to the message endpoint:

  1. Construct a payload targeting a protected attribute:
    {
      "actionQueue": [
        {
          "type": "syncInput",
          "payload": { "name": "template_name", "value": "admin/base.html" }
        }
      ],
      "data": {},
      "meta": "<checksum_of_empty_dict>"
    }
    
  2. The server-side component updates its internal state: self.template_name = "admin/base.html".
  3. Subsequent re-rendering displays the content of the targeted template, bypassing intended component logic.

Impact

Low severity. The risk is limited to unauthorized manipulation of component state and rendering of existing templates within the application's configured template directories. Remote Code Execution (RCE) is not possible via this vector.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIdjango-unicornall versions0.67.0

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for django-unicorn. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update django-unicorn to 0.67.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-ffv6-jj46-x367 is resolved across your whole dependency graph.

  3. 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.

  4. How O3 protects you

    O3 pinpoints whether GHSA-ffv6-jj46-x367 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-ffv6-jj46-x367. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

## Summary Component state manipulation is possible in `django-unicorn` due to missing access control checks during property updates and method calls. An attacker can bypass the intended `_is_public` protection to modify internal attributes such as `template_name` or trigger protected methods. ## Vulnerability Details: Component Access Control Bypass Security analysis identified that the framework fails to enforce visibility boundaries defined by `_is_public` within the action parsers. Specifically, the logic in `set_property_value()` and `_call_method_name()` utilizes `getattr` and `setattr`
O3 Security · Impact-Aware SCA

Is GHSA-ffv6-jj46-x367 in your dependencies?

O3 detects GHSA-ffv6-jj46-x367 across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.