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CVE-2026-44977

9.0 · CRITICAL

countly-server is the server-side part of Countly, a product analytics solution.

Published Oct 16, 2026CWE-79EPSS 0.44%

Overview

CVE-2026-44977 is a critical-severity vulnerability. It was published on October 16, 2026 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

countly-server is the server-side part of Countly, a product analytics solution. Prior to 24.05.50 and 25.03.44, plugins/star-rating/api/api.js allows a non-global application administrator to use uploadFeedbackFile to store attacker-controlled active content while trusting the supplied MIME type. plugins/star-rating/frontend/app.js publicly serves the stored content from feedback/preview/ with the attacker-influenced Content-Type, so a global administrator who opens the preview executes the payload in the Countly origin and exposes authenticated session capabilities, including auth_token and csrf_token values. This issue is fixed in versions 24.05.50 and 25.03.44.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/Countly/countly-server/commit/ae899f37bc6d70c1b44859756ce80a204ae72631GitHubgithub.com/Countly/countly-server/commit/fcb16c808c0fdb6dc99fe9c66de7fc560b3a9c41GitHubgithub.com/Countly/countly-server/releases/tag/24.05.50GitHubgithub.com/Countly/countly-server/releases/tag/25.03.44GitHubgithub.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxcGitHubgithub.com/Countly/countly-server/security/advisories/GHSA-jqp4-p86c-phxc

How CyberStrike helps

Frequently asked questions

What is CVE-2026-44977?

CVE-2026-44977 is a critical-severity vulnerability. It was published on October 16, 2026 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

How severe is CVE-2026-44977?

This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-44977?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-44977?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-44977 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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