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SCA: security update for @mcptoolshop/backpropagate, backpropagate (GHSA-f65r-h4g3-3h9h)

critical Tenable Cloud Security Plugin ID 444091

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Backpropagate is a Python library for fine-tuning large language models on a single GPU. In versions 1.1.0
 and 1.1.1, the optional Reflex web UI exposes a training control plane without authentication: dataset
 upload, model load, training start/stop, multi-run orchestration, GGUF export, and HuggingFace Hub push.
 The CLI accepts two operator-facing flags intended as security controls: --auth user:pass — documented as
 "require HTTP Basic authentication on every request to the UI." and--share — documented as "expose the UI
 on a public address; requires --auth." When --auth user:pass is passed, the CLI prints Auth: enabled
 (user: <username>) to confirm to the operator that authentication is active, then exports
 BACKPROPAGATE_UI_AUTH=user:pass to the subprocess that launches the Reflex backend. The Reflex backend
 (backpropagate/ui_app/**) never reads BACKPROPAGATE_UI_AUTH. No authentication middleware is registered.
 No request-level guard runs. No WebSocket upgrade guard runs. Any client that reaches the bound port —
 local or remote, depending on whether --share is used — has full UI access. An inline comment at
 backpropagate/cli.py:1217-1218 in the v1.1.0 source documents the gap: "For Phase 1 the variable is
 exported but Reflex doesn't read it yet." This comment was internal-facing; the user-facing documentation
 (README, CHANGELOG, SHIP_GATE) advertised the contract as enforced. An attacker who reaches the bound port
 can read uploaded datasets, trigger arbitrary training runs against any local base models as well as read
 their paths, trigger HuggingFace Hub pushes and cause disk-fill DoS. This issue has been fixed in version
 1.2.0. If developers cannot immediately upgrade to 1.2.0 run backprop ui with no flags so it binds to
 localhost, use SSH port-forwarding (ssh -L 7860:localhost:7860 <training-host>) instead of --share for
 remote access, and audit any host previously launched with --share, re-issuing any HF tokens used during
 those sessions. (CVE-2026-48797)

Solution

Update the @mcptoolshop/backpropagate library and its related packages to version 1.2.0 or later.

See Also

https://github.com/advisories/GHSA-f65r-h4g3-3h9h

Plugin Details

Severity: Critical

ID: 444091

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 6/27/2026

Updated: 6/27/2026

Risk Information

VPR

Risk Factor: High

Score: 7.4

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C

CVSS Score Source: CVE-2026-48797

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:U

Vector: 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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/26/2026

Vulnerability Publication Date: 6/16/2026

Reference Information

CVE: CVE-2026-48797