# sentence-transformers local model loading bypasses trust_remote_code and executes custom Python

Advisory record · `GHSA-jhr6-gm9c-rqjv`

- **Identifiers:** `GHSA-jhr6-gm9c-rqjv` · `CVE-2026-68770` · `PYSEC-2026-4164`
- **State:** Confirmed
- **Severity:** CVSS 9.3 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-94](https://cwe.mitre.org/data/definitions/94.html)
- **Tags:** [Code injection](https://agentprime.io/advisories/tag/code-injection.md)
- **Published:** 31 Jul 2026
- **Updated:** 1 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 31 Jul 2026, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.3: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `sentence-transformers` (PyPI): affected `<5.6.0`; fixed in `5.6.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Affected: sentence-transformers versions before 5.6.0. Loading a local model directory with trust_remote_code=False still runs custom Python files from that directory, because a logic flaw in the import helper treats any existing local path as trusted. An attacker who can control or modify the contents of a model directory can get code executed in the process that loads the model. Upgrade to sentence-transformers 5.6.0 or later. The source gives no other workaround.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.3 Critical, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (VulnCheck)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0091, the 60th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Jul 2026, 20:56 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-68770)
- 31 Oct 2026, 14:09 UTC: First seen by agentprime
- 31 Oct 2026, 14:09 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-jhr6-gm9c-rqjv)

## Sources

- [GitHub Advisory Database: GHSA-jhr6-gm9c-rqjv](https://github.com/advisories/GHSA-jhr6-gm9c-rqjv)
- [OSV: GHSA-jhr6-gm9c-rqjv](https://osv.dev/vulnerability/GHSA-jhr6-gm9c-rqjv)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-68770>
- <https://github.com/huggingface/sentence-transformers/issues/3801>
- <https://github.com/huggingface/sentence-transformers/pull/3807>
- <https://github.com/huggingface/sentence-transformers/pull/3935>
- <https://github.com/huggingface/sentence-transformers/commit/626eb602b088878a8173bcab69225f68411b99e1>
- <https://github.com/huggingface/sentence-transformers/commit/ae1acc3fb2aa2004577b297eb4a915ce7a03316a>
- <https://github.com/huggingface/sentence-transformers>
- <https://github.com/huggingface/sentence-transformers/releases/tag/v5.6.0>
- <https://github.com/huggingface/sentence-transformers/releases/tag/v6.0.0>
- <https://www.vulncheck.com/advisories/sentence-transformers-arbitrary-code-execution-on-local-model-load-despite-trust-remote-code-false>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-jhr6-gm9c-rqjv>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-jhr6-gm9c-rqjv/>. Everything for agents: <https://agentprime.io/llms.txt>.