CVE-2026-28406

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 54% of all CVEs by exploit prediction. 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: epss, secondary
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
52
EG Risk 52/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity82% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.8%
EPSS %ILE
56th
KEV
Not listed

Published

February 27, 2026

Last Modified

July 15, 2026

Advisory Details (6)

Auto-updated Jun 30, 2026
Patch available. Sources: github_commit, github_pr, github, redhat.
redhat
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28406.json
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=2443462
redhatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-28406
githubMentions a patch (unverified)

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-4rmf
github_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/326
github_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/a370e4b1f66e6e842b685c8f70ed507964c4b221

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/chainguard-dev/kaniko—
  • 1.25.4 up to 1.25.10: fixed in 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 / 23× 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.

Showing the most recent 100 of 121 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-09 05:58 UTCOSV refresh
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  9. 2026-08-31 16:34 UTCOSV refresh
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  71. 2026-07-18 06:59 UTCOSV refresh
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  74. 2026-07-15 16:57 UTCEPSS rescore
  75. 2026-07-15 16:57 UTCEPSS rescore

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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 on February 27, 2026, with the most recent update on July 15, 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 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-28406?
CVE-2026-28406 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-28406?
A fix for CVE-2026-28406 is available: update to the fixed version the vendor names in its advisory.

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