CVE-2026-27948 json
Copyparty vulnerable to eflected cross-site scripting via setck parameter
published 8mo ago modified 3mo ago also GHSA-62cr-6wp5-q43h , PYSEC-2026-2136 , EUVD-2026-8813
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
Copyparty is a portable file server. In versions prior to 1.20.9, an XSS allows for reflected cross-site scripting via URL-parameter `?setck=...`. Version 1.20.9 fixes the issue.
Patch / fix
- pypi copyparty 1.20.9
- 9001 copyparty 1.20.9
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | copyparty | <1.20.9 |
1.20.9 |
Affected products
- 9001 copyparty
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/9001/copyparty/commit/31b2801fd041f803f4a3d5c12c7d7cb5419048bc
web, patch
-
github.com
/9001/copyparty/security/advisories/GHSA-62cr-6wp5-q43h
web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-27948
advisory
-
github.com
/9001/copyparty
package
-
github.com
/9001/copyparty/releases/tag/v1.20.9
web
Sources
- CVE List CVE-2026-27948
- GitHub Advisory GHSA-62cr-6wp5-q43h
- NVD CVE-2026-27948
- OSV PYSEC-2026-2136
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.