PYSEC-2026-4045

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/djust/PYSEC-2026-4045.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-4045
Aliases
Published
2026-10-01T16:38:31Z
Modified
2026-10-01T17:45:02Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
djust's Django model serialization has no sensitive-field denylist: password hashes, privilege flags, and PII on a public view attribute are sent to the client
Details

Impact

When a Django Model instance is assigned to a public view attribute, djust serialized it to the client with no sensitive-field denylist — sending fields such as password (the hash), privilege flags (e.g. is_staff / is_superuser), tokens, and other PII to the browser. Because exposing model objects to templates is a normal djust pattern, this could leak credentials/PII without the developer realizing the full object crossed the wire.

Patches

Fixed in djust 1.0.7. Model serialization applies a secure-by-default sensitive-field denylist (password/hash/token/secret-style fields and known privilege flags are withheld) with an identity-subset fallback.

Workarounds

Keep Model instances on _private attributes and expose only the specific fields needed, until patched.

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-2026-4045.yaml"