Live › vulnerability › CVE-2026-42270
Go to dashboardCountly's server-side image and screenshot routes on the local filesystem backend pass a directory to a stream without an error handler when a URL-encoded dot is present. An unauthenticated attacker can repeatedly send such requests to crash the Node.js process and keep the analytics API unavailable.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Teams running self-hosted Countly server versions before 24.05.50 or 25.03.44 that use the local filesystem storage backend for images and screenshots. Exposure depends on whether these public image routes are reachable from outside the network; teams on managed hosting or patched releases can skip it.
No product ranges from the sources yet.
package.json of the countly-server install; affected if below 24.05.50 on the 24.05 line or below 25.03.44 on the 25.03 line/appimages/*, /memberimages/*, */screenshots/* or star-rating/images/ are reachable from the internet24.05.50 or 25.03.44 (the fixed release on each line)Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
countly-server is the server-side part of Countly, a product analytics solution. Prior to 24.05.50 and 25.03.44, star-rating/images/ and dashboards/images/screenshots/ are among public image and screenshot routes using the local fs storage backend that call getStream and pipe filesystem streams to HTTP responses without an error listener. An unauthenticated request containing a URL-encoded dot can make createReadStream open a directory, emit an asynchronous EISDIR error, and terminate the Node.js process as an unhandled exception, allowing repeated requests to keep the analytics API unavailable. The affected routes also include /appimages/, /memberimages/, and /screenshots/. This issue is fixed in versions 24.05.50 and 25.03.44.
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