PYSEC-2026-4039

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/djust/PYSEC-2026-4039.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-4039
Aliases
Published
2026-10-01T16:38:30Z
Modified
2026-10-01T17:45:03Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
djust's observability endpoints are network-exposed: the localhost gate is an opt-in middleware the docs omit, and the views enforce only DEBUG
Details

Impact

djust's observability endpoints expose live view/session state and a remote method-invocation surface (eval_handler). The localhost restriction was an opt-in middleware that the documented setup omits; the views themselves enforced only DEBUG. In the misconfigured-but-documented scenario (DEBUG on, middleware not installed) a non-localhost client could read live application state and invoke handlers remotely.

Patches

Fixed in djust 1.0.7. The localhost restriction is enforced in-view on every observability endpoint (no longer dependent on a separately-installed middleware), and eval_handler is restricted; gated requests receive a non-disclosing response.

Workarounds

Ensure DEBUG=False in production, and do not expose the observability endpoints to untrusted networks.

References

Affected packages

PyPI / djust

Package

Name
djust
View open source insights on deps.dev
Purl
pkg:pypi/djust

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.7

Affected versions

0.*
0.1.0
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.1.7
0.1.8
0.1.9
0.2.0
0.2.1
0.2.2
0.3.0
0.3.1
0.3.2
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.4.0
0.4.1
0.4.2
0.4.3
0.4.4
0.9.0
0.9.1
0.9.2
0.9.4
0.9.5
0.9.6
0.9.7
1.*
1.0.0rc11
1.0.0
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
1.0.6

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/djust/PYSEC-2026-4039.yaml"