PYSEC-2026-2290
Vulnerability from pysec - Published: 2026-06-03 14:16 - Updated: 2026-07-13 05:52
VLAI
Details
A vulnerability in the LightGlue model loading path of huggingface/transformers version 5.2.0 allows an attacker-controlled model repository to execute arbitrary code during model initialization. The issue arises because the trust_remote_code parameter, intended to prevent remote code execution, is overridden by untrusted serialized configuration data in a nested code path. Specifically, when loading a LightGlue model using AutoModel.from_pretrained() with trust_remote_code=False, the LightGlueConfig reads the trust_remote_code value from the untrusted config.json file and propagates it into nested AutoConfig.from_pretrained() calls. This results in the execution of attacker-provided Python modules, even when the victim explicitly disables remote code execution. The vulnerability poses a high risk for environments such as API inference servers, research notebooks, CI/CD pipelines, and model evaluation workers, potentially leading to credential theft, lateral movement, or persistence/backdoor deployment.
Severity
9.6 (Critical)
Impacted products
| Name | purl | transformers | pkg:pypi/transformers |
|---|
Aliases
{
"affected": [
{
"ecosystem_specific": {},
"package": {
"ecosystem": "PyPI",
"name": "transformers",
"purl": "pkg:pypi/transformers"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.2.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1",
"2.0.0",
"2.1.0",
"2.1.1",
"2.10.0",
"2.11.0",
"2.2.0",
"2.2.1",
"2.2.2",
"2.3.0",
"2.4.0",
"2.4.1",
"2.5.0",
"2.5.1",
"2.6.0",
"2.7.0",
"2.8.0",
"2.9.0",
"2.9.1",
"3.0.0",
"3.0.1",
"3.0.2",
"3.1.0",
"3.2.0",
"3.3.0",
"3.3.1",
"3.4.0",
"3.5.0",
"3.5.1",
"4.0.0",
"4.0.0rc1",
"4.0.1",
"4.1.0",
"4.1.1",
"4.10.0",
"4.10.1",
"4.10.2",
"4.10.3",
"4.11.0",
"4.11.1",
"4.11.2",
"4.11.3",
"4.12.0",
"4.12.1",
"4.12.2",
"4.12.3",
"4.12.4",
"4.12.5",
"4.13.0",
"4.14.0",
"4.14.1",
"4.15.0",
"4.16.0",
"4.16.1",
"4.16.2",
"4.17.0",
"4.18.0",
"4.19.0",
"4.19.1",
"4.19.2",
"4.19.3",
"4.19.4",
"4.2.0",
"4.2.1",
"4.2.2",
"4.20.0",
"4.20.1",
"4.21.0",
"4.21.1",
"4.21.2",
"4.21.3",
"4.22.0",
"4.22.1",
"4.22.2",
"4.23.0",
"4.23.1",
"4.24.0",
"4.25.0",
"4.25.1",
"4.26.0",
"4.26.1",
"4.27.0",
"4.27.1",
"4.27.2",
"4.27.3",
"4.27.4",
"4.28.0",
"4.28.1",
"4.29.0",
"4.29.1",
"4.29.2",
"4.3.0",
"4.3.0rc1",
"4.3.1",
"4.3.2",
"4.3.3",
"4.30.0",
"4.30.1",
"4.30.2",
"4.31.0",
"4.32.0",
"4.32.1",
"4.33.0",
"4.33.1",
"4.33.2",
"4.33.3",
"4.34.0",
"4.34.1",
"4.35.0",
"4.35.1",
"4.35.2",
"4.36.0",
"4.36.1",
"4.36.2",
"4.37.0",
"4.37.1",
"4.37.2",
"4.38.0",
"4.38.1",
"4.38.2",
"4.39.0",
"4.39.1",
"4.39.2",
"4.39.3",
"4.4.0",
"4.4.1",
"4.4.2",
"4.40.0",
"4.40.1",
"4.40.2",
"4.41.0",
"4.41.1",
"4.41.2",
"4.42.0",
"4.42.1",
"4.42.2",
"4.42.3",
"4.42.4",
"4.43.0",
"4.43.1",
"4.43.2",
"4.43.3",
"4.43.4",
"4.44.0",
"4.44.1",
"4.44.2",
"4.45.0",
"4.45.1",
"4.45.2",
"4.46.0",
"4.46.1",
"4.46.2",
"4.46.3",
"4.47.0",
"4.47.1",
"4.48.0",
"4.48.1",
"4.48.2",
"4.48.3",
"4.49.0",
"4.5.0",
"4.5.1",
"4.50.0",
"4.50.1",
"4.50.2",
"4.50.3",
"4.51.0",
"4.51.1",
"4.51.2",
"4.51.3",
"4.52.0",
"4.52.1",
"4.52.2",
"4.52.3",
"4.52.4",
"4.53.0",
"4.53.1",
"4.53.2",
"4.53.3",
"4.54.0",
"4.54.1",
"4.55.0",
"4.55.1",
"4.55.2",
"4.55.3",
"4.55.4",
"4.56.0",
"4.56.1",
"4.56.2",
"4.57.0",
"4.57.1",
"4.57.2",
"4.57.3",
"4.57.4",
"4.57.5",
"4.57.6",
"4.6.0",
"4.6.1",
"4.7.0",
"4.8.0",
"4.8.1",
"4.8.2",
"4.9.0",
"4.9.1",
"4.9.2",
"5.0.0",
"5.0.0rc0",
"5.0.0rc1",
"5.0.0rc2",
"5.0.0rc3",
"5.1.0",
"5.2.0"
]
}
],
"aliases": [
"CVE-2026-5241"
],
"details": "A vulnerability in the LightGlue model loading path of huggingface/transformers version 5.2.0 allows an attacker-controlled model repository to execute arbitrary code during model initialization. The issue arises because the `trust_remote_code` parameter, intended to prevent remote code execution, is overridden by untrusted serialized configuration data in a nested code path. Specifically, when loading a LightGlue model using `AutoModel.from_pretrained()` with `trust_remote_code=False`, the `LightGlueConfig` reads the `trust_remote_code` value from the untrusted `config.json` file and propagates it into nested `AutoConfig.from_pretrained()` calls. This results in the execution of attacker-provided Python modules, even when the victim explicitly disables remote code execution. The vulnerability poses a high risk for environments such as API inference servers, research notebooks, CI/CD pipelines, and model evaluation workers, potentially leading to credential theft, lateral movement, or persistence/backdoor deployment.",
"id": "PYSEC-2026-2290",
"modified": "2026-07-13T05:52:14.826934Z",
"published": "2026-06-03T14:16:46.337Z",
"references": [
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-5241"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5241.json"
},
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:34456"
},
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:37275"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484384"
},
{
"type": "FIX",
"url": "https://github.com/huggingface/transformers/commit/676559d5022b74aaa0cee1cee0842b7f27c5320e"
},
{
"type": "EVIDENCE",
"url": "https://huntr.com/bounties/ceb3ce1a-4c45-497a-b25e-cb9a7685e619"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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