sentence-transformers contains a security control bypass vulnerability that allows attackers to achieve arbitrary code execution by…
CVE-2026-68770
sentence-transformers contains a security control bypass vulnerability that allows attackers to achieve arbitrary code execution by exploiting a logic flaw in the importmoduleclass helper within sentencetransformers/util/misc.py, where the guard condition includes an 'or os.path.exists(modelnameorpath)' clause that satisfies the trust gate whenever the supplied path exists on the local filesystem, regardless of the trustremotecode=False argument. Attackers who can control or influence the contents of a model directory on disk can place malicious Python files such as modeling.py referenced via modules.json, causing the code to execute at import time when an application loads the model with SentenceTransformer(path, trustremotecode=False), bypassing the documented security contract and achieving code execution within the loading process.
Assessment
- CVSS
- 9.3 (v4.0)
- Severity
- Critical
- EPSS
- 0.91% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 31 July 2026
- Last updated
- 23 October 2026
- Affected
- Hugging Face · sentence-transformers · sentence-transformers
- Weakness
- CWE-94
- Assigner
- disclosure@vulncheck.com
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
At the source
References
- https://github.com/huggingface/sentence-transformers
- https://github.com/huggingface/sentence-transformers/commit/ae1acc3fb2aa2004577b297eb4a915ce7a03316a
- https://github.com/huggingface/sentence-transformers/issues/3801
- https://github.com/huggingface/sentence-transformers/pull/3807
- https://www.vulncheck.com/advisories/sentence-transformers-arbitrary-code-execution-on-local-model-load-despite-trust-remote-code-false
- https://nvd.nist.gov/vuln/detail/CVE-2026-68770
- https://github.com/huggingface/sentence-transformers/pull/3935
- https://github.com/huggingface/sentence-transformers/commit/626eb602b088878a8173bcab69225f68411b99e1
- https://github.com/huggingface/sentence-transformers/releases/tag/v5.6.0
- https://github.com/huggingface/sentence-transformers/releases/tag/v6.0.0
- https://github.com/advisories/GHSA-jhr6-gm9c-rqjv
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