What is CVE-2026-41582?

CVE-2026-41582 is a high-severity vulnerability in Countly Countly-Server, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-10-16.

How severe is CVE-2026-41582?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Countly Countly-Server

CVE-2026-41582

countly-server is the server-side part of Countly, a product analytics solution. Prior to 24.05.50 and 25.03.44, public image and screenshot routes implemented in frontend/express/app.js, plugins/star-rating/frontend/app.js, and plugins/dashboards/frontend/app.js concatenate attacker-controlled wildcard paths without containment validation. On deployments using the local filesystem backend, an unauthenticated request can traverse outside the intended asset directories and reach getStats or getStream in api/utils/countlyFs.js, allowing arbitrary readable server files to be disclosed. The affected routes include /appimages/*, /memberimages/*, */screenshots/*, /star-rating/images/*, and /dashboards/images/screenshots/*. This issue is fixed in versions 24.05.50 and 25.03.44.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Countly Countly-Server — versions < 24.05.50, >= 25.03, < 25.03.44

Weakness classification (CWE)

CWE-22 — Path Traversal

References

Frequently asked questions

What is CVE-2026-41582?: CVE-2026-41582 is a high-severity vulnerability in Countly Countly-Server, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-10-16.
How severe is CVE-2026-41582?: High severity. CVSS v3 base score is 7.5 out of 10.