PYSEC-2026-32

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/copyparty/PYSEC-2026-32.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-32
Aliases
Published
2026-03-11T21:16:16.913Z
Modified
2026-05-20T09:18:55.554878Z
Severity
  • 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

Copyparty is a portable file server. Prior to 1.20.12, if an attacker has been given both read- and write-permissions to the server, they can upload a malicious file with the filename .prologue.html and then craft a link to potentially execute arbitrary JavaScript in the victim's context. Note that it is intended behavior that the JavaScript would execute if the target clicks a link to the HTML file itself; "https://example.com/foo/.prologue.html". The vulnerability is that "https://example.com/foo/?b" would also evaluate the file, making the behavior unexpected. There are existing preventative measures (strict SameSite cookies) which makes it harder to leverage this vulnerability in an attack; in order to gain control of the target's authenticated session, the link must be clicked from a page served by the server itself -- most likely by editing an existing resource, which would require additional access permissions. Finally, for this attack to be successful, the attacker's target must click the specific crafted link given by the attacker. This vulnerability is not activated by normally browsing the web-UI on the server. This vulnerability is fixed in 1.20.12.

References

Affected packages

PyPI / copyparty

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.12

Affected versions

0.*
0.2.3
0.3.0
0.3.1
0.4.0
0.4.1
0.4.2
0.4.3
0.5.0
0.5.1
0.5.2
0.5.3
0.5.4
0.5.5
0.5.6
0.5.7
0.6.0
0.6.2
0.6.3
0.7.0
0.7.1
0.7.2
0.7.3
0.7.4
0.7.5
0.7.6
0.7.7
0.8.1
0.8.3
0.9.0
0.9.1
0.9.3
0.9.4
0.9.5
0.9.6
0.9.7
0.9.8
0.9.9
0.9.10
0.9.11
0.9.13
0.10.0
0.10.1
0.10.2
0.10.3
0.10.4
0.10.5
0.10.6
0.10.7
0.10.8
0.10.9
0.10.10
0.10.11
0.10.12
0.10.13
0.10.14
0.10.15
0.10.16
0.10.17
0.10.18
0.10.19
0.10.20
0.10.21
0.10.22
0.11.0
0.11.1
0.11.5
0.11.6
0.11.7
0.11.8
0.11.9
0.11.10
0.11.11
0.11.12
0.11.13
0.11.14
0.11.15
0.11.16
0.11.17
0.11.18
0.11.19
0.11.20
0.11.21
0.11.22
0.11.23
0.11.24
0.11.26
0.11.27
0.11.28
0.11.29
0.11.30
0.11.31
0.11.32
0.11.33
0.11.34
0.11.35
0.11.36
0.11.37
0.11.38
0.11.39
0.11.40
0.11.41
0.11.42
0.11.43
0.11.44
0.11.45
0.11.46
0.11.47
0.12.1
0.12.3
0.12.4
0.12.5
0.12.6
0.12.7
0.12.8
0.12.9
0.12.10
0.12.11
0.12.12
0.13.0
0.13.1
0.13.2
0.13.3
0.13.5
0.13.6
0.13.7
0.13.9
0.13.10
0.13.11
0.13.12
0.13.13
0.13.14
1.*
1.0.0
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
1.0.7
1.0.8
1.0.9
1.0.10
1.0.11
1.0.12
1.0.13
1.0.14
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.1.7
1.1.8
1.1.9
1.1.10
1.1.11
1.1.12
1.2.0
1.2.1
1.2.2
1.2.3
1.2.4
1.2.5
1.2.6
1.2.7
1.2.8
1.2.9
1.2.10
1.2.11
1.3.0
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
1.3.8
1.3.9
1.3.10
1.3.11
1.3.12
1.3.13
1.3.14
1.3.15
1.3.16
1.4.0
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.5.0
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
1.5.6
1.6.0
1.6.1
1.6.2
1.6.3
1.6.4
1.6.5
1.6.6
1.6.7
1.6.8
1.6.9
1.6.10
1.6.11
1.6.12
1.6.13
1.6.14
1.6.15
1.7.0
1.7.1
1.7.2
1.7.3
1.7.4
1.7.5
1.7.6
1.8.0
1.8.1
1.8.2
1.8.3
1.8.4
1.8.6
1.8.7
1.8.8
1.9.0
1.9.1
1.9.2
1.9.3
1.9.4
1.9.5
1.9.6
1.9.7
1.9.8
1.9.9
1.9.10
1.9.11
1.9.12
1.9.13
1.9.14
1.9.15
1.9.16
1.9.17
1.9.18
1.9.19
1.9.20
1.9.21
1.9.24
1.9.25
1.9.26
1.9.27
1.9.28
1.9.29
1.9.30
1.9.31
1.10.0
1.10.1
1.10.2
1.11.0
1.11.1
1.11.2
1.12.0
1.12.1
1.12.2
1.13.0
1.13.1
1.13.2
1.13.3
1.13.4
1.13.5
1.13.6
1.13.7
1.13.8
1.14.0
1.14.1
1.14.2
1.14.3
1.14.4
1.15.0
1.15.1
1.15.2
1.15.3
1.15.4
1.15.5
1.15.6
1.15.7
1.15.8
1.15.9
1.15.10
1.16.0
1.16.1
1.16.2
1.16.3
1.16.4
1.16.5
1.16.6
1.16.7
1.16.8
1.16.9
1.16.10
1.16.11
1.16.12
1.16.13
1.16.14
1.16.15
1.16.16
1.16.17
1.16.18
1.16.19
1.16.20
1.16.21
1.17.0
1.17.1
1.17.2
1.18.0
1.18.1
1.18.2
1.18.3
1.18.4
1.18.5
1.18.6
1.18.7
1.18.8
1.18.9
1.18.10
1.19.0
1.19.1
1.19.2
1.19.3
1.19.4
1.19.5
1.19.6
1.19.7
1.19.8
1.19.9
1.19.10
1.19.11
1.19.12
1.19.13
1.19.14
1.19.15
1.19.16
1.19.17
1.19.18
1.19.19
1.19.20
1.19.21
1.19.22
1.19.23
1.20.0
1.20.1
1.20.2
1.20.3
1.20.4
1.20.5
1.20.6
1.20.7
1.20.8
1.20.9
1.20.10
1.20.11

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/copyparty/PYSEC-2026-32.yaml"