High [CVE-2026-49114] Arbitrary file write via symlink following and path traversal
This high-severity Red Hat Linux advisory covers CVE-2026-49114 affecting Red Hat OpenShift AI (RHOAI).
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Summary
In ONNX before 1.21.0, the 'save_external_data' function builds the external-data file path from the model's external_data location field and opens it for writing without 'O_NOFOLLOW/O_EXCL', after a non-atomic 'os.path.isfile()' check.
A local attacker with write access to the directory where a victim serializes external data can deterministically pre-plant a symlink that is being followed, causing the victim's write to append to any file the victim can write, e.g. ~/.ssh/authorized_keys, cron files, or application configs. Fixed in 1.21.0.
A flaw was found in ONNX. The `save_external_data` function is vulnerable to symlink following and path traversal.
This allows the attacker to cause the victim's write operation to append to arbitrary files, potentially leading to unauthorized modification of critical system files. Red Hat severity: Important — CVSS 7.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H).
Weakness: CWE-367. Affected Red Hat products: Red Hat OpenShift AI (RHOAI).
Red Hat does not currently list a fixing RHSA for this CVE.
- < 1.21.0
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation
Upgrade to a fixed release: 1.21.0. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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