{"id":"CVE-2026-126772","kind":"vulnerability","aliases":["CVE-2026-126772"],"related":[],"title":"OpsTree REMS: authenticated users can post comments as incident creators","description":"OpsTree REMS through 1.0.0 contains an improper attribution vulnerability that allows authenticated users to post comments as the incident creator via POST /api/v1/incidents/{incident_id}/comment. Lower-privileged attackers can comment on incidents owned by users such as a Super User to impersonate them and corrupt the incident timeline and audit trail.","summary":"OpsTree REMS through 1.0.0 lets an authenticated user post comments on incidents as the incident's creator through the comment API endpoint. An attacker with a low-privilege account can impersonate a Super User and alter the incident timeline and audit trail.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["incident-management","ops-tree-rems","other"],"not_affected_if":["unknown"],"how_to_check":"- Check the installed REMS version against the range `1.0.0` and earlier\n- Review the incident comment API route `POST /api/v1/incidents/{incident_id}/comment` for author attribution logic","fix":null,"status":"open","published_at":"2026-11-11T19:17:37+00:00","first_seen_at":"2026-11-11T19:28:46+00:00","triaged_at":"2026-11-11T19:30:30+00:00","updated_at":"2026-11-11T19:30:30+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-11T19:30:30Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"OpsTree REMS: authenticated users can post comments as incident creators","impact":"medium","summary":"OpsTree REMS through 1.0.0 lets an authenticated user post comments on incidents as the incident's creator through the comment API endpoint. An attacker with a low-privilege account can impersonate a Super User and alter the incident timeline and audit trail.","audience":"businesses","category":"other","nicknames":[],"who_cares":["ops-tree-rems","incident-management"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"attacker impersonates admins and corrupts incident audit trail","analyst_note":"Confirm the fixed version and affected deployment defaults from the NVD entry and the VulnCheck advisory.","how_to_check":"- Check the installed REMS version against the range `1.0.0` and earlier\n- Review the incident comment API route `POST /api/v1/incidents/{incident_id}/comment` for author attribution logic","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Teams that run OpsTree REMS for incident response are exposed when any user with a low-privilege account can reach the comment endpoint. The sources do not say which configurations or roles are affected beyond authenticated users, and they do not name a fixed version.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000717,"input_tokens":4597,"output_tokens":514,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-126772':13A,16A '-2026':12A,15A '/api/v1/incidents':89C '/comment':92C '1.0.0':27B,70C 'account':53B 'allow':77C 'alter':60B 'api':44B 'attack':47B,96C 'attribut':74C 'audit':65B,118C 'authent':3A,30B,78C 'comment':7A,33B,43B,82C,98C 'contain':71C 'corrupt':113C 'creator':10A,40B,86C 'cve':11A,14A 'endpoint':45B 'id':91C 'imperson':55B,110C 'improp':73C 'incid':9A,18B,35B,38B,62B,85C,90C,100C,115C 'incident-manag':17B 'let':28B 'low':51B 'low-privileg':50B 'lower':94C 'lower-privileg':93C 'manag':19B 'op':21B 'ops-tree-rem':20B 'opstre':1A,24B,67C 'own':101C 'post':6A,32B,81C,88C 'privileg':52B,95C 'rem':2A,23B,25B,68C 'super':57B,107C 'timelin':63B,116C 'trail':66B,119C 'tree':22B 'user':4A,31B,58B,79C,103C,108C 'via':87C 'vulner':75C","nicknames":[],"mitigations":[],"who_affected":"Teams that run OpsTree REMS for incident response are exposed when any user with a low-privilege account can reach the comment endpoint. The sources do not say which configurations or roles are affected beyond authenticated users, and they do not name a fixed version.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["incidentmanagement","medium","opstreerems","other"],"campaign_type":null,"search_a":"'-126772':13A,16A '-2026':12A,15A 'authent':3A 'comment':7A 'creator':10A 'cve':11A,14A 'incid':9A 'opstre':1A 'post':6A 'rem':2A 'user':4A","search_b":"'1.0.0':27B 'account':53B 'alter':60B 'api':44B 'attack':47B 'audit':65B 'authent':30B 'comment':33B,43B 'creator':40B 'endpoint':45B 'imperson':55B 'incid':18B,35B,38B,62B 'incident-manag':17B 'let':28B 'low':51B 'low-privileg':50B 'manag':19B 'op':21B 'ops-tree-rem':20B 'opstre':24B 'post':32B 'privileg':52B 'rem':23B,25B 'super':57B 'timelin':63B 'trail':66B 'tree':22B 'user':31B,58B","search_c":"'/api/v1/incidents':89C '/comment':92C '1.0.0':70C 'allow':77C 'attack':96C 'attribut':74C 'audit':118C 'authent':78C 'comment':82C,98C 'contain':71C 'corrupt':113C 'creator':86C 'id':91C 'imperson':110C 'improp':73C 'incid':85C,90C,100C,115C 'lower':94C 'lower-privileg':93C 'opstre':67C 'own':101C 'post':81C,88C 'privileg':95C 'rem':68C 'super':107C 'timelin':116C 'trail':119C 'user':79C,103C,108C 'via':87C 'vulner':75C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T19:17:37+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-126772","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126772","severity":null,"published_at":"2026-11-11T19:17:37+00:00","modified_at":"2026-11-11T19:17:37+00:00","first_seen_at":"2026-11-11T19:28:46+00:00","fetched_at":"2026-11-11T19:28:46+00:00","note":null}],"documents":[{"id":128102,"url":"https://www.vulncheck.com/advisories/opstree-rems-through-1.0.0-comment-author-spoofing-via-incident-comment-api","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}