Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| k3s-io | k3s | >= 1.35.0-rc1+k3s1, < 1.35.3+k3s1, >= 1.34.0-rc1+k3s1, < 1.34.6+k3s1, < 1.33.10+k3s1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | k3s-static-1.32 +1 | No fix yet | — |
| Wolfi rolling | rke2-cloud-provider | 1.36.2-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/k3s-io/k3s | >= 1.35.0-rc1, < 1.35.3 | 1.35.3 | GHSA-jxr7-mqhw-9p98 |
| Go | github.com/k3s-io/k3s | >= 1.34.0-rc1, < 1.34.6 | 1.34.6 | GHSA-jxr7-mqhw-9p98 |
| Go | github.com/k3s-io/k3s | < 1.33.10 | 1.33.10 | GHSA-jxr7-mqhw-9p98 |
| Go | github.com/k3s-io/k3s | all versions | — | GO-2026-5973 |
Advisories 1
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026