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Fencer Vulns
medium 6.4

CVE-2026-107174 json

Source-to-image: source-to-image: security boundary bypass via absolute symbolic link extraction

published 2026-10-07 33 d ago modified 2026-10-07 33 d ago also EUVD-2026-94367

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-107174 updated cvss 6.4

source-to-image: source-to-image: Security boundary bypass via absolute symbolic link extraction

  • Red Hat OpenShift Serverless openshift-serverless-1/kn-client-kn-rhel9, openshift-serverless-clients 1.17.0-4.el9, openshift-serverless-1/kn-plugin-func-func-util-rhel9 Red Hat OpenShift Source-to-Image (S2I) source-to-image/source-to-image-rhel8, source-to-image/source-to-image-rhel9 Red Hat OpenShift Container Platform 4 openshift4/ose-docker-builder, openshift4/ose-docker-builder-rhel9 Red Hat Web Terminal web-terminal/web-terminal-tooling-rhel9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
33 d ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Affected products

  • Red Hat OpenShift Serverless
  • Red Hat OpenShift Source-to-Image (S2I)
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat Web Terminal

Classification

Weakness
  • CWE-61 UNIX Symbolic Link (Symlink) Following

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.