Medium · CVSS 6.0CVE-2026-71492GHSA-X8WG-4XGC-VR54

Banks: Path traversal in `DirectoryPromptRegistry.set()` allows arbitrary file write outside the registry rootCVE-2026-71492

Answer in brief

CVE-2026-71492 records a Medium severity (CVSS 6.0) vulnerability in Banks: Path traversal in `DirectoryPromptRegistry.set()` allows arbitrary file write outside the registry root. The current sources do not mark it as known exploited. The current feed maps masci/banks (generic), banks (pip). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 20, 2026Updated Sep 18, 2026Source checked Oct 4, 2026First seen by HOL Aug 20, 2026Material review Sep 18, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.0
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 6.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps masci/banks (generic), banks (pip). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
masci/banksgeneric	<2.4.5	2.4.5
bankspip	<2.4.5	2.4.5

Recommended response

Check inventory. Check lockfiles and deployed manifests for masci/banks, banks.
Review the reported fix. Update masci/banks to 2.4.5; banks to 2.4.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 20, 2026

Sources and claim methodology

Upstream source description

Banks generates meaningful LLM prompts using a simple template language. Prior to version 2.4.5, DirectoryPromptRegistry.set() in src/banks/registries/directory.py interpolates attacker-controlled Prompt.name and Prompt.version values into a Path without canonicalization or containment validation. Relative traversal such as ../victim/foo and an absolute Prompt.name can escape or discard the configured registry root, while overwrite=True permits replacement of existing target files. The poisoned name is persisted in index.json and reconstructed by _load(), allowing the out-of-root path to survive later registry loads. An application that forwards request data into these fields can therefore write Prompt.raw bytes to attacker-chosen paths writable by the application process. This issue is fixed in version 2.4.5.

Quoted source text, attributed separately from HOL analysis.