A flaw was found in source-to-image. When unpacking archive files, the application fails to properly sanitize symbolic links pointing to absolute file paths. An attacker who supplies a malicious builder image can exploit this vulnerability by embedding links pointing outside the extraction directory. This allows the attacker to bypass sandbox boundaries, potentially leading to unauthorized information disclosure or file modification on the host system.

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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

Treat s2i builder images and application source as trusted inputs. Do not run s2i-based builds against builder images or repositories you do not control or have not verified. Where possible, run builds on isolated build nodes and restrict who can trigger builds or change BuildConfig and image stream references that point at custom builder images. There is no configuration option to disable only this symlink extraction behavior without changing how builds are performed. Apply updated source-to-image packages or rebuilt platform images when Red Hat publishes them for your product and stream.

History

Wed, 07 Oct 2026 14:45:00 +0000

Type Values Removed Values Added
Description A flaw was found in source-to-image. When unpacking archive files, the application fails to properly sanitize symbolic links pointing to absolute file paths. An attacker who supplies a malicious builder image can exploit this vulnerability by embedding links pointing outside the extraction directory. This allows the attacker to bypass sandbox boundaries, potentially leading to unauthorized information disclosure or file modification on the host system.
Title Source-to-image: source-to-image: security boundary bypass via absolute symbolic link extraction
First Time appeared Redhat
Redhat openshift
Redhat serverless
Redhat source To Image
Redhat webterminal
Weaknesses CWE-61
CPEs cpe:/a:redhat:openshift:4
cpe:/a:redhat:serverless:1
cpe:/a:redhat:source_to_image:1
cpe:/a:redhat:webterminal:1
Vendors & Products Redhat
Redhat openshift
Redhat serverless
Redhat source To Image
Redhat webterminal
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-07T16:17:28.174Z

Reserved: 2026-10-07T12:26:30.460Z

Link: CVE-2026-107174

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-07T15:17:19.190

Modified: 2026-10-07T17:16:53.380

Link: CVE-2026-107174

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T15:30:17Z

Weaknesses