CVE-2026-54250 json
K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression
published 4mo ago modified 17d ago also EUVD-2026-39512 , GHSA-jxr7-mqhw-9p98 , GO-2026-5973
- cvss
- 5.8
- 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 6%
- public exploits
- 0
- none known
Summary
K3s is a fully conformant production-ready Kubernetes distribution. Prior to 1.35.3+k3s1, 1.34.6+k3s1, v1.33.10+k3s1, a path traversal vulnerability exists in K3s's etcd snapshot decompression functionality. Zip files containing archive members with maliciously crafted names can be written to arbitrary locations on the filesystem when an administrator restores the archive as a compressed etcd snapshot. This vulnerability is fixed in 1.35.3+k3s1, 1.34.6+k3s1, v1.33.10+k3s1.
Patch / fix
- go github.com/k3s-io/k3s 1.33.10, 1.34.6, 1.35.3
- k3s k3s 1.33.10+k3s1, 1.34.6+k3s1, 1.35.3+k3s1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
Is CVE-2026-54250 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.8 | CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H |
| GitHub | 3.1 | 5.8 | CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/k3s-io/k3s | >=1.35.0-rc1, <1.35.3 >=1.34.0-rc1, <1.34.6 <1.33.10 all versions |
1.35.3 1.34.6 1.33.10 |
Affected products
- k3s-io k3s
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/k3s-io/k3s/security/advisories/GHSA-jxr7-mqhw-9p98
web, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-54250
advisory
-
github.com
/k3s-io/k3s
package
Sources
- CVE List CVE-2026-54250
- GitHub Advisory GHSA-jxr7-mqhw-9p98
- NVD CVE-2026-54250
- OSV GO-2026-5973
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.