CVE-2026-17106
Vulnerability Summary
Timeline
Description
The tar extraction routines in moby/go-archive (Unpack, UnpackLayer, Untar/UntarUncompressed, and the ApplyLayer helpers) do not confine filesystem operations to the destination directory. The extractor decides where each archive entry lands using lexical string checks and then performs the filesystem operation on a path that is resolved by the OS, so links introduced by the archive can be followed out of the destination directory. An attacker who controls the contents of an archive can create or overwrite files at arbitrary paths writable by the extracting process.
CVSS Metrics
- v4.0•HIGH•Score: 7.1CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- v4.0•HIGH•Score: 7.1CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Trends
Current EPSS score: 0.33%• Percentile: 26%
Techniques & Countermeasures
- CWE-59•Improper Link Resolution Before File Access ('Link Following')
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Affected Systems
- chainguard•act
all
- chainguard•buildah
< 1.45.0-r2
- chainguard•buildah-fips
< 1.45.0-r2
- chainguard•buildkitd
< 0.32.2-r2
- chainguard•buildkitd-fips
< 0.32.2-r2
- chainguard•ctop-fips
< 0.7.7-r1
- chainguard•docker-28
all
- chainguard•docker-cli-buildx
< 0.36.1-r2
- chainguard•docker-cli-buildx-fips
< 0.36.1-r2
- chainguard•dockerd-28
all
- chainguard•dockerd-fips-28
all
- chainguard•dockerd-fips-29
< 29.5.2-r21
- chainguard•falcoctl
< 0.13.0-r24
- chainguard•falcoctl-fips
< 0.13.0-r21
- chainguard•k3d
all
- chainguard•kaniko
< 1.25.18-r5
- chainguard•kaniko-fips
< 1.25.18-r3
- chainguard•kaniko-warmer
< 1.25.18-r5
- chainguard•kaniko-warmer-fips
< 1.25.18-r3
- chainguard•kubescape
< 4.0.12-r7
- chainguard•kubescape-server
< 4.0.12-r6
- chainguard•kubescape-server-downloader
< 4.0.12-r6
- chainguard•kubescape-server-fips
< 4.0.12-r5
- chainguard•kubescape-server-fips-downloader
< 4.0.12-r5
- chainguard•openbao
< 2.6.2-r1
- chainguard•openbao-fips
< 2.6.2-r1
- chainguard•podman-5.8
< 5.8.6-r4
- chainguard•podman-6.0
< 6.0.2-r4
- chainguard•podman-6.1
< 6.1.0-r1
- chainguard•podman-fips-5.8
< 5.8.6-r5
- chainguard•podman-fips-6.0
< 6.0.2-r3
- chainguard•podman-fips-6.1
< 6.1.0-r1
- chainguard•py3-docker
all | < 0
- chainguard•py3.10-docker
all | < 0
- chainguard•py3.11-docker
all | < 0
- chainguard•py3.12-docker
all | < 0
- chainguard•py3.13-docker
all | < 0
- chainguard•skaffold
< 2.24.0-r4
- chainguard•skaffold-fips
< 2.24.0-r5
- chainguard•telegraf-1.36
< 1.36.4-r14
- chainguard•telegraf-1.37
< 1.37.3-r24
- chainguard•telegraf-1.38
< 1.38.4-r20
- wolfi•act
all
- wolfi•buildah
< 1.45.0-r2
- wolfi•buildkitd
< 0.32.2-r2
- wolfi•docker-28
all
- wolfi•docker-cli-buildx
< 0.36.1-r2
- wolfi•dockerd-28
all
- wolfi•falcoctl
< 0.13.0-r24
- wolfi•k3d
all
Showing first 50 affected entries in server-rendered view.
References (33)
- https://github.com/moby/go-archive/security/advisories/GHSA-hfg8-hc9c-6c3h
- https://docs.docker.com/desktop/release-notes/#4860
- https://github.com/docker/sbx-releases/releases/tag/v0.38.0
- https://docs.docker.com/engine/release-notes/29/#2970
- https://github.com/docker/cli/releases/tag/v29.7.0
- https://github.com/docker/compose/releases/tag/v5.4.0
- https://github.com/moby/go-archive/releases/tag/v0.3.0
- https://github.com/masasron/CopyEscape-CVE-2026-17106
- https://github.com/moby/moby/issues/52948
- https://github.com/bikini/exploitarium/tree/main/docker-cp-copyout-destination-escape
- https://github.com/moby/go-archive
- https://github.com/moby/moby/releases/tag/docker-v29.7.0
- https://www.imperva.com/blog/copyescape-taking-over-docker-hosts-with-docker-cp
- https://ubuntu.com/security/CVE-2026-17106
- https://www.cve.org/CVERecord?id=CVE-2026-17106
- https://www.suse.com/security/cve/CVE-2026-17106
- https://security-tracker.debian.org/tracker/CVE-2026-17106
- https://bugzilla.suse.com/1275248
- https://access.redhat.com/errata/RHSA-2026:52807
- https://images.redhat.com/
- https://access.redhat.com/security/cve/CVE-2026-75593
- https://access.redhat.com/security/updates/classification/
- https://access.redhat.com/security/cve/CVE-2026-17106
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_52807.json
- https://bugzilla.redhat.com/show_bug.cgi?id=2518147
- https://nvd.nist.gov/vuln/detail/CVE-2026-17106
- https://www.suse.com/support/update/announcement/2026/suse-su-20263863-1/
- https://bugzilla.redhat.com/show_bug.cgi?id=2519913
- https://www.cve.org/CVERecord?id=CVE-2026-75593
- https://nvd.nist.gov/vuln/detail/CVE-2026-75593
- https://github.com/moby/buildkit/releases/tag/v0.31.2
- https://github.com/moby/buildkit/security/advisories/GHSA-g2h8-426c-7976
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17106.json