What’s Vulnerable › Vulnerabilities

CVE-2026-25154: LocalSend has Stored XSS in Web Share Interface via Filename

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-30 · updated 2026-06-17
• Weakness: CWE-79

Description

LocalSend is a free, open-source app that allows users to share files and messages with nearby devices over their local network without needing an internet connection. In versions up to and including 1.17.0, when a user initiates a "Share via Link" session, the LocalSend application starts a local HTTP server to host the selected files. The client-side logic for this web interface is contained in `app/assets/web/main.js`. Note that at [0], the `handleFilesDisplay` function constructs the HTML for the file list by iterating over the files received from the server. Commit 8f3cec85aa29b2b13fed9b2f8e499e1ac9b0504c contains a patch.

Affected products

• localsend: through 1.17.0

References

• https://github.com/localsend/localsend/commit/8f3cec85aa29b2b13fed9b2f8e499e1ac9b0504c
• https://github.com/localsend/localsend/security/advisories/GHSA-34v6-52hh-x4r4

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