High

Kinto Attachment's attachments can be replaced on read-only records

  • Disclosed: 08.02.2024
  • Updated: 11.10.2026 13:18

Impact

The attachment file of an existing record can be replaced if the user has "read" permission on one of the parent (collection or bucket).

And if the "read" permission is given to "system.Everyone" on one of the parent, then the attachment can be replaced on a record using an anonymous request.

Note that if the parent has no explicit read permission, then the records attachments are safe.

Patches

Workarounds

None if the read permission has to remain granted.

Updating to 6.4.0 or applying the patch individually (if updating is not feasible) is strongly recommended.

References

Affected software

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PlatformPackageVulnerable versionsFixed in
Python (PyPI) kinto-attachment < 6.4.0 6.4.0

References

CVSS score 8.6/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Weakness (CWE)
-
Platform
Python (PyPI)
Package
kinto-attachment
Disclosed
08.02.2024
Updated
11.10.2026 13:18

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-1494 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-hvp4-vrv2-8wrq - CC BY 4.0

Vulnerability history: kinto-attachment

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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