HOMEVULNERABILITIESCVE-2026-27489
HIGH

CVE-2026-27489

CWE-23Published: April 1, 2026· Updated: Apr 7, 2026

7.5
CVSS v3.1
EPSS:0.06%probability of exploitation in 30 daysPercentile:19.7th

Official 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.

NVD Source

Technical Analysis

CVE-2026-27489 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

linuxfoundation1 product
onnx
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb
PATCHhttps://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73

All References (2)

→
https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cbPatch
→
https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73Exploit · Mitigation · Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2026-27489
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-23
CISA KEVNo
EPSS (30d)0.06%
Affected1 vendor
PublishedApr 1, 2026

Related CVEs (CWE-23)

CVE-2026-8326
10.0
CVE-2026-52813
KEV10.0
CVE-2026-33494
10.0
CVE-2025-62878
9.9
CVE-2026-22070
9.8
CVE-2026-21659
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-27489 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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