CVE-2026-27489

ONNX: Path Traversal via Symlink

HIGH
7.5
CVSS Score
Published: April 1, 2026 at 05:33 PM UTC
Updated: July 15, 2026 at 02:19 AM UTC
3 products affected across 3 vendorsOnnxOpenShift AIONNX

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
PoC

Description

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, a path traversal vulnerability via symlink allows to read arbitrary files outside model or user-provided directory. This issue has been patched in version 1.21.0.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.21.0
Affected range stops below 1.21.0, so it looks safe — our inference, not a vendor statement
v < 1.21.0
Affected range stops below 1.21.0, so it looks safe — our inference, not a vendor statement
All versions
Vendor states this is fixed in 1780069146 (unaffected)
Vendor states this is fixed in 1780069222 (unaffected)
Vendor states this is fixed in 1780069226 (unaffected)
Vendor states this is fixed in 1780078312 (unaffected)
Vendor states this is fixed in 1780078388 (unaffected)
Vendor states this is fixed in 1780078413 (unaffected)
Vendor states this is fixed in 1780078414 (unaffected)
Vendor states this is fixed in 1780078416 (unaffected)
Vendor states this is fixed in 1780078429 (unaffected)
Vendor states this is fixed in 1780078629 (unaffected)
Vendor states this is fixed in 1780078632 (unaffected)
Vendor states this is fixed in 1780417775 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

x_refsource_CONFIRMExploitMitigationPatchVendor Advisory
Source: cverecord
https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:24977
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/security/cve/CVE-2026-27489
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://bugzilla.redhat.com/show_bug.cgi?id=2453929

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-23CWE-61CWE-22

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