CVE-2026-123820 (CVSS 5.3)

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, 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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0030

Probability of exploitation

0.23%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-280 CWE-280

References

Other References

https://github.com/wagtail/wagtail/commit/320c37ed4624702d3864ce2364ce8536b2ce5115 https://github.com/wagtail/wagtail/commit/9a69e0ad153c515ddd86ddd33d2c9d2554201568 https://github.com/wagtail/wagtail/commit/b8a2040dfcdb97498b746254ad8bb4e47e21358c https://github.com/wagtail/wagtail/commit/cba80389067121c0fae41a3312e2daf76f0eb206 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 https://github.com/wagtail/wagtail/security/advisories/GHSA-c2xx-cjmh-9q8f

Frequently Asked Questions

What is CVE-2026-123820? +

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-123820? +

CVE-2026-123820 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0030, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-123820? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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