# CVE-2026-123820: Wagtail: Improper restriction handling on descendant collections in Documents and Images API

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

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, the Wagtail Documents and Images API V2 excludes directly restricted collections but fails to exclude their descendant collections, even though descendants inherit ancestor view restrictions. An API user can therefore list the filenames and names of documents and images stored in descendant collections that should remain private. This issue is fixed in versions 7.0.9, 7.3.4, 7.4.3, and 8.0rc2.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- wagtail / wagtail: < 7.0.9 (affected); >= 7.1, < 7.3.4 (affected); >= 7.4, < 7.4.3 (affected); = 8.0rc1 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-280

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/wagtail/wagtail/security/advisories/GHSA-c2xx-cjmh-9q8f (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/wagtail/wagtail/commit/320c37ed4624702d3864ce2364ce8536b2ce5115 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wagtail/wagtail/commit/9a69e0ad153c515ddd86ddd33d2c9d2554201568 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wagtail/wagtail/commit/b8a2040dfcdb97498b746254ad8bb4e47e21358c (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wagtail/wagtail/commit/cba80389067121c0fae41a3312e2daf76f0eb206 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wagtail/wagtail/releases/tag/v7.0.9 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wagtail/wagtail/releases/tag/v7.3.4 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wagtail/wagtail/releases/tag/v7.4.3 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wagtail/wagtail/releases/tag/v8.0rc2 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-123820; retrieved 2026-11-09; source updated 2026-11-09

Revision: e4c8cf287b3d0e960897f086a3a14cfa88bd452cac3febbbe8febfd67bf160a3

Canonical: https://y2.dev/cve/CVE-2026-123820

## Agent and API access

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- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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