kaniko is a tool to build container images from a Dockerfile, inside a container or Kubernetes cluster. Starting in version 1.25.4 and prior to version 1.25.10, kaniko unpacks build context archives using filepath.Join(dest, cleanedName) without enforcing that the final path stays within dest. A tar entry like ../outside.txt escapes the extraction root and writes files outside the destination directory. In environments with registry authentication, this can be chained with docker credential helpers to achieve code execution within the executor process. Version 1.25.10 uses securejoin for path resolution in tar extraction.
CVE-2026-28406
HIGHPre-NVD 8.28.2
EchelonGraph scoreLOW confidence
This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
8.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.2Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.2
- EG Score
- 8.2(low)
- EPSS
- 45.0%
- KEV
- Not listed
Published
February 27, 2026
Last Modified
June 30, 2026
Advisory Details (6)
Auto-updated Jun 30, 2026Patch available. Sources: github_commit, github_pr, github, redhat.
redhat
2443462 – (CVE-2026-28406) CVE-2026-28406 kaniko: kaniko: Arbitrary code execution via path traversal in build context archive unpacking
https://bugzilla.redhat.com/show_bug.cgi?id=2443462github Patch Available
tar archive path traversal in build context extraction allows writing files outside destination directory · Advisory · chainguard-forks/kaniko · GitHub
https://github.com/chainguard-forks/kaniko/security/advisories/GHSA-6rxq-q92g-4rmfgithub_pr Patch Available
fix(util): use securejoin for path resolution in tar extraction
Patch available: chainguard-forks/kaniko v1.25.10 (PR #326 merged 2026-02-27)
https://github.com/chainguard-forks/kaniko/pull/326github_commit Patch Available
commit a370e4b1f66e (chainguard-forks/kaniko)
Patch available: chainguard-forks/kaniko v1.25.10 (contains commit a370e4b1f66e)
https://github.com/chainguard-forks/kaniko/commit/a370e4b1f66e6e842b685c8f70ed507964c4b221Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/chainguard-dev/kaniko | — | 1.25.10 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 13× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-08 15:15 UTCEPSS rescore
- 2026-07-07 13:46 UTCEPSS rescore
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-05 02:30 UTCEPSS rescore
- 2026-07-04 06:31 UTCEPSS rescore
- 2026-07-01 15:06 UTCEPSS rescore
- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-30 04:40 UTCEG score recompute
- 2026-06-30 04:31 UTCNVD updatefirst tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-28406?
CVE-2026-28406 is a high vulnerability published on February 27, 2026. kaniko is a tool to build container images from a Dockerfile, inside a container or Kubernetes cluster. Starting in version 1.25.4 and prior to version 1.25.10, kaniko unpacks build context archives using filepath.Join(dest, cleanedName) without enforcing that the final path stays within dest. A…
When was CVE-2026-28406 disclosed?
CVE-2026-28406 was first published in the National Vulnerability Database on February 27, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28406 actively exploited?
CVE-2026-28406 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 45.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-28406?
CVE-2026-28406 has a CVSS v3 base score of 8.2 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-28406?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28406, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-28406
Is Your Infrastructure Affected by CVE-2026-28406?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.