{"id":"CVE-2026-113411","kind":"vulnerability","aliases":["CVE-2026-113411"],"related":[],"title":"Nerimity Desktop: crafted URL passed to shell.openExternal lets remote attackers act","description":"A vulnerability was found in Nerimity Desktop up to 2.2.2. Affected by this issue is the function shell.openExternal of the file src/mainWindow.js of the component Window Open Handler. The manipulation of the argument url results in improper authorization in handler for custom url scheme. The attack can be executed remotely. The exploit has been made public and could be used. Upgrading to version 2.3.3 can resolve this issue. The patch is identified as f4df21bbc290f6c1956d899cf4da9e963074a6e4. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.","summary":"Nerimity Desktop up to 2.2.2 passes an attacker-controlled URL to shell.openExternal in its window open handler without proper checks on custom URL schemes. A remote attacker can use this to trigger unauthorized actions on the user's machine.","severity":"high","cvss":7.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["desktop","electron","nerimity","package"],"not_affected_if":["version-2.3.3-or-later","web-client-only"],"how_to_check":"- Run the Nerimity Desktop app and check its version against `2.3.3`\n- Check the bundled `src/mainWindow.js` for `shell.openExternal` in the Window Open Handler\n- unknown for anything beyond the version","fix":"- Upgrade Nerimity Desktop to `2.3.3` or later (patch commit f4df21bbc290f6c1956d899cf4da9e963074a6e4)","status":"open","published_at":"2026-10-20T15:17:18+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","triaged_at":"2026-10-25T03:22:42+00:00","updated_at":"2026-10-25T03:22:42+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:22:42Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Nerimity Desktop to `2.3.3` or later (patch commit f4df21bbc290f6c1956d899cf4da9e963074a6e4)","reach":"internet","title":"Nerimity Desktop: crafted URL passed to shell.openExternal lets remote attackers act","impact":"high","summary":"Nerimity Desktop up to 2.2.2 passes an attacker-controlled URL to shell.openExternal in its window open handler without proper checks on custom URL schemes. A remote attacker can use this to trigger unauthorized actions on the user's machine.","category":"package","nicknames":[],"who_cares":["nerimity","electron","desktop"],"confidence":0.6,"needs_auth":"unknown","worst_case":"attacker opens custom URL schemes on the user's machine","analyst_note":"Confirm what the custom URL scheme handler can actually launch and whether user confirmation is required; see the NVD entry and the linked patch commit f4df21bbc290f6c1956d899cf4da9e963074a6e4.","how_to_check":"- Run the Nerimity Desktop app and check its version against `2.3.3`\n- Check the bundled `src/mainWindow.js` for `shell.openExternal` in the Window Open Handler\n- unknown for anything beyond the version","needs_analyst":true,"not_affected_if":["web-client-only","version-2.3.3-or-later"],"who_is_affected":"Users of the Nerimity Desktop Electron client at version 2.2.2 or earlier. The flaw is in the desktop app's handling of links opened from the chat window, so the web version and other clients are not described as affected. Anyone running an older desktop build should upgrade.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000654,"input_tokens":3427,"output_tokens":623,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-113411':14A,17A '-2026':13A,16A '2.2.2':26B,71C '2.3.3':125C 'act':11A 'action':56B 'affect':72C,140C,161C 'argument':94C 'attack':10A,30B,49B,107C 'attacker-control':29B 'author':99C 'check':42B 'compon':86C,141C 'contact':145C 'control':31B 'could':119C 'craft':3A 'custom':44B,103C 'cve':12A,15A 'desktop':2A,18B,23B,68C 'earli':146C 'electron':19B 'execut':110C 'exploit':113C 'f4df21bbc290f6c1956d899cf4da9e963074a6e4':135C 'file':82C 'fix':157C 'found':65C 'function':78C 'handler':39B,89C,101C 'identifi':133C 'improp':98C 'issu':75C,129C 'let':8A 'machin':61B 'made':116C 'manipul':91C 'manner':152C 'nerim':1A,20B,22B,67C 'open':38B,88C 'packag':21B 'pass':5A,27B 'patch':131C 'product':162C 'profession':151C 'proper':41B 'public':117C 'quick':154C 'releas':155C 'remot':9A,48B,111C 'resolv':127C 'respond':147C 'result':96C 'scheme':46B,105C 'shell.openexternal':7A,34B,79C 'src/mainwindow.js':83C 'trigger':54B 'unauthor':55B 'upgrad':122C,138C 'url':4A,32B,45B,95C,104C 'use':51B,121C 'user':59B 'vendor':143C 'version':124C,158C 'vulner':63C 'window':37B,87C 'without':40B","nicknames":[],"mitigations":[],"who_affected":"Users of the Nerimity Desktop Electron client at version 2.2.2 or earlier. The flaw is in the desktop app's handling of links opened from the chat window, so the web version and other clients are not described as affected. Anyone running an older desktop build should upgrade.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T15:17:18+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"cna@vuldb.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113411","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113411","severity":null,"published_at":"2026-10-20T15:17:18+00:00","modified_at":"2026-10-22T22:18:03+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","fetched_at":"2026-10-23T22:28:58+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}