CVE-2026-66063 json
goshs has a Path Traversal issue
published 2026-07-28 3 mo ago modified 2026-10-23 16 d ago also GHSA-wg2q-39h6-66x9 , GO-2026-6137 , EUVD-2026-50082
- cvss
- 6.5
- 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 28%
- public exploits
- 0
- none known
Summary
goshs is a feature-rich single-binary file server for red teamers and developers. Prior to 2.1.5, the httpserver/updown.go multipart upload handler split part.FileName() on / but did not reject .., allowing an unauthenticated upload with filename .. to create a file outside the served tree. This issue is fixed in version 2.1.5.
Patch / fix
- go goshs.de/goshs/v2 2.1.5-0.20260727065949-f3ef599e4091
- go github.com/patrickhener/goshs/v2 2.1.5-0.20260727065949-f3ef599e4091
- govulncheck-vulndb SLES for SAP applications 16.0, SLES 16.0 0.0.20260827T195228-160000.1.1
suse advisories SUSE-SU-2026:23625-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260827T195228-160000.1.1
opensuse advisories openSUSE-SU-2026:21761-1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | goshs.de/goshs/v2 | <2.1.5-0.20260727065949-f3ef599e4091 |
2.1.5-0.20260727065949-f3ef599e4091 |
| go | github.com/patrickhener/goshs/v2 | <2.1.5-0.20260727065949-f3ef599e4091 |
2.1.5-0.20260727065949-f3ef599e4091 |
| go | goshs.de/goshs | <=1.1.4 all versions |
no fix listed |
| go | github.com/patrickhener/goshs | <=1.1.4 all versions |
no fix listed |
Affected products
- goshs-labs goshs
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
Sources
- CVE List CVE-2026-66063
- GitHub Advisory GHSA-wg2q-39h6-66x9
- NVD CVE-2026-66063
- OSV GO-2026-6137
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