Source-to-image lets attackers bypass sandbox with absolute symlinks
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Deferred Red Hat: fix deferred
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
Red Hat OpenShift Serverless, OpenShift Source-to-Image (S2I), Red Hat OpenShift Container Platform 4 and Red Hat Web Terminal are affected. Source-to-image does not properly sanitize symbolic links that point to absolute file paths when unpacking archives (CWE-61). An attacker who supplies a malicious builder image can embed links that point outside the extraction directory, bypassing sandbox boundaries to disclose information or modify files on the host.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | OpenShift Serverless | — | — | No fix listed | CNA |
| Red Hat | OpenShift Serverless | — | — | No fix listed | CNA |
| Red Hat | OpenShift Serverless | — | — | No fix listed | CNA |
| Red Hat | OpenShift Source-to-Image (S2I) | — | — | No fix listed | CNA |
| Red Hat | OpenShift Source-to-Image (S2I) | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Web Terminal | — | — | No fix listed | CNA |
- OpenShift Serverless VendorRed Hat Affected — Fixed in — No fix listed CNA
- OpenShift Serverless VendorRed Hat Affected — Fixed in — No fix listed CNA
- OpenShift Serverless VendorRed Hat Affected — Fixed in — No fix listed CNA
- OpenShift Source-to-Image (S2I) VendorRed Hat Affected — Fixed in — No fix listed CNA
- OpenShift Source-to-Image (S2I) VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Web Terminal VendorRed Hat Affected — Fixed in — No fix listed CNA
Remediation
No fixed version is listed for OpenShift Serverless, OpenShift Source-to-Image (S2I), Red Hat OpenShift Container Platform 4 or Red Hat Web Terminal.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Serverless | Affected | No fix yet: Fix deferred |
| OpenShift Source-to-Image (S2I) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat Web Terminal | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-07 Threatist record created from CVE-2026-107174
- 2026-10-07 Alias added: GHSA-rp44-r78q-h2wp
- 2026-10-07 Affected versions changed · Red Hat
- 2026-10-07 CVSS score added · Red Hat
- 2026-10-07 CISA SSVC decision points changed
- 2026-10-07 Priority changed: MEDIUM → LOW
References
More Red Hat vulnerabilities
- TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
- TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
- TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
- TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
- TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
- TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-107174 · CVE Program
- CVE-2026-107174 · NVD
- FIRST EPSS
- GHSA-rp44-r78q-h2wp · GitHub Advisory Database · CC BY 4.0
- CVE-2026-107174 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences