{"id":"CVE-2026-5241","aliases":["GHSA-fgcw-684q-jj6r","PYSEC-2026-2290"],"url":"https://o3.security/vulnerability/CVE-2026-5241","summary":"Policy Bypass in LightGlue Nested Config Resolution in huggingface/transformers","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.","published":"2026-06-03T12:33:10.227Z","modified":"2026-08-07T11:51:22.802271637Z","cvss":{"score":7.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"transformers","fixedVersion":"5.5.0"}],"fix":{"url":"https://github.com/huggingface/transformers/commit/676559d5022b74aaa0cee1cee0842b7f27c5320e","label":"huggingface/transformers@676559d"},"references":[{"type":"WEB","url":"https://huntr.com/bounties/ceb3ce1a-4c45-497a-b25e-cb9a7685e619"},{"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":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42644"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-5241"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5241.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5241"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2484384"},{"type":"FIX","url":"https://github.com/huggingface/transformers/commit/676559d5022b74aaa0cee1cee0842b7f27c5320e"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:22.802271637Z"}}