Accelerate path traversal and denial of service via sharded checkpoint weight_map entriesGHSA-4j2p-28q2-5m79
HIGHFix: huggingface/accelerate#4070GHSA-4j2p-28q2-5m79 is a high-severity (CVSS 7.1) Path Traversal vulnerability in accelerate. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for GHSA-4j2p-28q2-5m79.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
accelerateReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
Hugging Face Accelerate through 1.14.0 contains a path traversal vulnerability in load_checkpoint_in_model and load_checkpoint_and_dispatch functions that fail to sanitize weight_map entries from sharded checkpoint indexes. Attackers can supply relative paths with ../ sequences or absolute paths to read arbitrary files, or point shard entries at named pipes to cause indefinite blocking and denial of service.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | accelerate | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for accelerate, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of accelerate for GHSA-4j2p-28q2-5m79. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
This is an Important vulnerability in Hugging Face Accelerate that could lead to arbitrary file disclosure and denial of service. While requiring user interaction, an attacker could craft malicious `weight_map` entries in sharded checkpoint indexes to exploit path traversal, impacting the confidentiality and…
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.Source: Red Hat security advisory for GHSA-4j2p-28q2-5m79 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat AI Inference Server 3.4 | rhaii/vllm-spyre-rhel9:1791858592 | RHSA-2026:83114 |
| Red Hat AI Inference Server 3.4 | rhaii/model-opt-cuda-rhel9:1791857110 | RHSA-2026:83116 |
| Red Hat AI Inference Server 3.4 | rhaii/vllm-rocm-rhel9:1791856725 | RHSA-2026:83121 |
| Red Hat AI Inference Server 3.5 | rhaii/vllm-spyre-rhel9:1791818357 | RHSA-2026:82371 |
| Red Hat OpenShift AI 2.25 | rhoai/odh-caikit-tgis-serving-rhel9:1787060100 | RHSA-2026:65126 |
| Red Hat OpenShift AI 2.25 | rhoai/odh-caikit-nlp-rhel9:1791448212 | RHSA-2026:87410 |
| Red Hat OpenShift AI 3.4 | rhoai/odh-autorag-rhel9:1791557539 | RHSA-2026:84734 |
| Red Hat OpenShift AI 3.5 | rhoai/odh-automl-rhel9:1791916705 | RHSA-2026:86891 |
Frequently Asked Questions
Is GHSA-4j2p-28q2-5m79 in your dependencies?
Find it across PyPI, including transitive dependencies.