{"id":"CVE-2026-118426","kind":"vulnerability","aliases":["CVE-2026-118426"],"related":[],"title":"Octopus Server: any logged-in user can search LDAP users and groups","description":"In affected versions of Octopus Server with the LDAP authentication provider enabled, any authenticated user could call the LDAP user search and LDAP group search.","summary":"With the LDAP authentication provider enabled, Octopus Server lets any authenticated user call the LDAP user search and LDAP group search functions. An attacker with a normal account can enumerate directory users and groups they should not see.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ldap","octopus-deploy","runtime","self-hosted"],"not_affected_if":["ldap-disabled","other-auth-provider"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-29T04:18:35+00:00","first_seen_at":"2026-10-29T04:41:58+00:00","triaged_at":"2026-10-29T04:43:10+00:00","updated_at":"2026-10-29T04:43:10+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-29T04:43:10Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Octopus Server: any logged-in user can search LDAP users and groups","impact":"low","summary":"With the LDAP authentication provider enabled, Octopus Server lets any authenticated user call the LDAP user search and LDAP group search functions. An attacker with a normal account can enumerate directory users and groups they should not see.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["octopus-deploy","ldap","self-hosted"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"Attacker enumerates directory users and groups via search","analyst_note":"Find the affected version range and fixed release in the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-118426 or the Octopus advisory.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":["ldap-disabled","other-auth-provider"],"who_is_affected":"Octopus Server instances that use LDAP as the authentication provider are exposed; any account able to log in can reach the search functions. Instances using other authentication providers are not described as affected. The sources do not list affected version ranges.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000639,"input_tokens":4073,"output_tokens":463,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-118426':16A,19A '-2026':15A,18A 'account':55B 'affect':67C 'attack':51B 'authent':31B,38B,75C,79C 'call':40B,82C 'could':81C 'cve':14A,17A 'deploy':23B 'directori':58B 'enabl':33B,77C 'enumer':57B 'function':49B 'group':13A,47B,61B,89C 'host':27B 'ldap':10A,20B,30B,42B,46B,74C,84C,88C 'let':36B 'log':5A 'logged-in':4A 'normal':54B 'octopus':1A,22B,34B,70C 'octopus-deploy':21B 'provid':32B,76C 'runtim':24B 'search':9A,44B,48B,86C,90C 'see':65B 'self':26B 'self-host':25B 'server':2A,35B,71C 'user':7A,11A,39B,43B,59B,80C,85C 'version':68C","nicknames":[],"mitigations":[],"who_affected":"Octopus Server instances that use LDAP as the authentication provider are exposed; any account able to log in can reach the search functions. Instances using other authentication providers are not described as affected. The sources do not list affected version ranges.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"first_public_at":"2026-10-29T04:18:35+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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":"security@octopus.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118426","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118426","severity":null,"published_at":"2026-10-29T04:18:35+00:00","modified_at":"2026-10-29T04:18:35+00:00","first_seen_at":"2026-10-29T04:41:58+00:00","fetched_at":"2026-10-29T04:41:58+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"}