CVE-2026-70657 json
Copyparty: file/dirkey confusion
published 2026-08-18 2 mo ago modified 2026-10-22 17 d ago also GHSA-x5pq-m9p8-f4vx , PYSEC-2026-3660 , EUVD-2026-60949
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
Summary
Copyparty is a portable file server. Prior to 1.20.17, copyparty volumes with the dk or dks directory-key flag combined with the fk or fka file-key flag can convert a valid file key into a directory key, granting read access to the containing folder. This vulnerability was only reachable if both types of keys (filekeys and dirkeys) were manually enabled in the volume flags simultaneously. This issue is fixed in version 1.20.17.
Patch / fix
- pypi copyparty 1.20.17
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | copyparty | <1.20.17 |
1.20.17 |
Affected products
- 9001 copyparty
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/9001/copyparty/commit/e40755331ba9449993ff482456e6bdd2c6deb950
web
-
github.com
/9001/copyparty/security/advisories/GHSA-x5pq-m9p8-f4vx
web
-
github.com
/9001/copyparty/releases/tag/v1.20.17
web
-
github.com
/9001/copyparty
package
-
pypi.org
/project/copyparty
package
-
github.com
/advisories/GHSA-x5pq-m9p8-f4vx
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-70657
advisory
Sources
- CVE List CVE-2026-70657
- GitHub Advisory GHSA-x5pq-m9p8-f4vx
- NVD CVE-2026-70657
- OSV PYSEC-2026-3660
Fencer Vulns 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.