{"id":"CVE-2026-110447","kind":"vulnerability","aliases":["CVE-2026-110447"],"related":[],"title":"Collabora CODE server in Nextcloud: command injection enables remote code execution","description":"Collabora Collabora Online – Built-in CODE Server when used within the NextCloud platform contains an OS command injection vulnerability that allows for remote code execution when the CODE server isn't running.\n\nCISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","summary":"The built-in CODE server used by the Nextcloud richdocumentscode app contains an OS command injection flaw. When the CODE server is not running, a remote attacker can execute commands on the host.","severity":"critical","cvss":9.2,"epss":0.01225,"exploited":true,"exploited_at":"2026-10-23T00:00:00+00:00","products":[{"name":"Collabora Collabora Online – Built-in CODE Server","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["collabora","exploited","nextcloud","package","richdocumentscode","self-hosted"],"not_affected_if":["no-richdocumentscode-app"],"how_to_check":"- Check whether the Nextcloud richdocumentscode app is installed and which version it is, e.g. `occ app:list | grep richdocumentscode`\n- Check whether the built-in CODE server is in use, e.g. `unknown`","fix":"- Update the richdocumentscode app (Collabora Online Built-in CODE Server) to `26.4.303` or later\n- Follow CISA BOD 26-04 guidance and vendor instructions for mitigations; the sources give no other steps","status":"open","published_at":"2026-10-14T03:17:20+00:00","first_seen_at":"2026-10-24T00:09:50+00:00","triaged_at":"2026-10-25T02:58:18+00:00","updated_at":"2026-10-25T02:58:18+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T02:58:18Z","model":"claude-haiku-5-5","output":{"fix":"- Update the richdocumentscode app (Collabora Online Built-in CODE Server) to `26.4.303` or later\n- Follow CISA BOD 26-04 guidance and vendor instructions for mitigations; the sources give no other steps","reach":"internet","title":"Collabora CODE server in Nextcloud: command injection enables remote code execution","impact":"high","summary":"The built-in CODE server used by the Nextcloud richdocumentscode app contains an OS command injection flaw. When the CODE server is not running, a remote attacker can execute commands on the host.","category":"package","nicknames":[],"who_cares":["nextcloud","collabora","self-hosted","richdocumentscode"],"confidence":0.7,"needs_auth":"unknown","worst_case":"Remote attacker runs operating system commands on the server.","analyst_note":"Confirm the exact trigger condition (CODE server not running) and the affected version range from the Collabora or NVD advisory; sources give only the fixed version 26.4.303.","how_to_check":"- Check whether the Nextcloud richdocumentscode app is installed and which version it is, e.g. `occ app:list | grep richdocumentscode`\n- Check whether the built-in CODE server is in use, e.g. `unknown`","needs_analyst":true,"not_affected_if":["no-richdocumentscode-app"],"who_is_affected":"Nextcloud installations that use the Collabora Online built-in CODE server through the richdocumentscode app. The sources describe the flaw as triggered when the CODE server is not running, so the exposure depends on that state. Teams that do not run Nextcloud with richdocumentscode can skip it.","user_interaction":"unknown","needs_special_setup":"yes","severity_if_unknown":"critical"},"cost_usd":0.000666,"input_tokens":3611,"output_tokens":610,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-04':118C,144C,175C '-110447':14A,17A '-2026':13A,16A '26':117C,143C,174C 'accord':107C 'action':103C 'adher':171C 'allow':89C 'app':45B 'appli':104C 'applic':141C 'asset':165C 'attack':61B 'base':122C 'bod':116C,142C,173C 'built':22A,36B,72C 'built-in':21A,35B,71C 'cisa':101C,114C,131C 'cloud':147C 'code':2A,10A,24A,38B,54B,74C,92C,96C 'collabora':1A,18A,19A,26B,68C,69C 'command':6A,49B,64B,85C 'complianc':112C 'contain':46B,82C 'cve':12A,15A 'discontinu':150C 'enabl':8A 'ensur':111C,170C 'evalu':163C 'execut':11A,63B,93C 'exploit':27B 'exposur':168C 'flaw':51B 'follow':140C 'forens':133C 'guidanc':129C,145C 'guidelin':177C 'host':33B,67B 'in':23A 'inject':7A,50B,86C 'instruct':110C 'internet':167C 'isn':98C 'mitig':105C,156C 'nextcloud':5A,28B,43B,80C 'note':128C,139C 'onlin':70C 'online':20A 'os':48B,84C 'packag':29B 'patch':176C 'platform':81C 'priorit':119C 'product':154C 'remot':9A,60B,91C 'requir':102C,135C 'respons':161C 'richdocumentscod':30B,44B 'risk':124C 'run':58B,100C 'secur':120C 'see':125C,136C 'self':32B 'self-host':31B 'server':3A,25A,39B,55B,75C,97C 'servic':148C 'stakehold':159C 'triag':134C 'unavail':158C 'updat':121C 'url':126C,137C 'use':40B,77C,151C 'vendor':109C 'vulner':87C 'within':78C","nicknames":[],"mitigations":[],"who_affected":"Nextcloud installations that use the Collabora Online built-in CODE server through the richdocumentscode app. The sources describe the flaw as triggered when the CODE server is not running, so the exposure depends on that state. Teams that do not run Nextcloud with richdocumentscode can skip it.","tier":"A","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-14T03:17:20+00:00","kev":{"dateAdded":"2026-10-23","dueDate":"2026-10-26","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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":"cve@mitre.org","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2026-110447","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-110447","severity":null,"published_at":"2026-10-23T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-24T00:09:50+00:00","fetched_at":"2026-10-25T12:39:21+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-110447","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110447","severity":null,"published_at":"2026-10-14T03:17:20+00:00","modified_at":"2026-10-23T21:17:21+00:00","first_seen_at":"2026-10-24T00:11:00+00:00","fetched_at":"2026-10-24T00:11:00+00:00","note":null},{"source":"epss","external_id":"CVE-2026-110447","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-110447","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T07:15:51+00:00","fetched_at":"2026-10-24T07:15:51+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"}