sniff_csv provides filesystem access even when enable_external_access is disabled in duckdb

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2024-41672: 0.81% estimated exploitation activity in the next 30 days; percentile 57.05 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary Content in filesystem is accessible for reading using sniffcsv, even with enableexternalaccess=false. Details During a pentest, a security researcher was able to access environment variable data and other system data by using the sniffcsv function, even though we set enableexternalaccess to false. PoC Impact Provides an attacker with access to filesystem even when access is expected to be disabled and other similar functions do NOT provide access. For example select from readcsv('/proc/self/environ') fails with a permission error. There seems to be two vectors to this vulnerability: 1. Access to files that should otherwise not be allowed. (We expect Permission Error: Scanning CSV files is disabled through configuration and not to provide any access to the file or even acknowledge that it exists). 2. The content from a (non-csv?) file can be read (e.g. /etc/hosts, proc/self/environ, etc) even though that doesn't seem to be the intent of the sniffcsv function (my understanding…

Published by the source

21 Jan 2025, 21:07 UTC

Last modified by the source

10 Jun 2026, 17:14 UTC

Source last checked

26 Oct 2026, 13:30 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-w2gf-jxc9-pf2q

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-w2gf-jxc9-pf2q

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# Patch Next advisory brief: CVE-2024-41672

Advisory: sniff_csv provides filesystem access even when enable_external_access is disabled in duckdb
IDs: CVE-2024-41672, GHSA-w2gf-jxc9-pf2q
Record: https://patchnext.com/advisories/cve-2024-41672 (revision 2, source checked 26 Oct 2026, 13:30 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: duckdb 1.1.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI duckdb: affected >= 1.0.0, < 1.1.0; fixed in 1.1.0

## Suggested inspection (read-only)
- `python -m pip show duckdb`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on duckdb.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-w2gf-jxc9-pf2q (OSV record GHSA-w2gf-jxc9-pf2q lists affected ranges: PyPI duckdb >=1.0.0 <1.1.0 (fixed))
- Verified: https://github.com/advisories/GHSA-w2gf-jxc9-pf2q (GitHub-reviewed advisory GHSA-w2gf-jxc9-pf2q lists affected ranges: PyPI duckdb >=1.0.0 <1.1.0)

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