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CVE-2026-77371: Redash lets DuckDB queries read or write files

CVE-2026-77371 · published 1 day ago

Summary

Versions 26.0.0 through 26.9.0 of Redash let a user who can run DuckDB queries read any file the Redash service can access or write files to the server. This could expose secret configuration data and let attackers spoof sessions. Upgrade Redash to version 26.9.0 or later and limit who can run DuckDB queries, or disable external file access in the DuckDB settings.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
getredash	redash	>= 26.0.0, < 26.9.0

Original advisory text

Redash: DuckDB query runner allows arbitrary file read/write via unrestricted external access

Redash is a package for data visualization and sharing. From 26.0.0 until 26.9.0, the DuckDB query runner's _connect() path in redash/query_runner/duckdb.py created connections with enable_external_access left at its default value of true. A user with query access to an administrator-created DuckDB data source could use native file-reading functions to retrieve files readable by the Redash process or use COPY TO to write files with that process's privileges. Reading application secrets such as REDASH_COOKIE_SECRET or REDASH_SECRET_KEY could also enable forged sessions and authentication bypass. This issue is fixed in version 26.9.0.

References

https://github.com/getredash/redash/security/advisories/GHSA-cr68-3xxj-cg9f Vendor Advisory
https://github.com/getredash/redash/commit/7387072af40913a64e7b3be470491792f2d55... Patch
https://github.com/getredash/redash/releases/tag/v26.9.0 URL
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77371... Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-77371 Vendor Advisory

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker full control

Severity

9.4 Critical

Exploitation

<1% chance of attack within 30 days

Type

CWE-284Improper Access Control

Timeline

Published14 Oct 2026

Updated15 Oct 2026

First seen14 Oct 2026

Sources

CVE-2026-77371 · NVD

CVE-2026-77371 · MITRE

CVE-2026-77371 · OSV

GHSA-cr68-3xxj-cg9f · GHSA

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