{"id":"CVE-2026-127078","kind":"vulnerability","aliases":["CVE-2026-127078"],"related":[],"title":"OpsTree BuildPiper: authenticated users can attach other apps' environments","description":"OpsTree BuildPiper before 2.7.0 contains an authorization bypass vulnerability that allows authenticated users to attach another application's environment to their service by supplying a foreign project_env_id. Attackers can configure CI and trigger builds and deployments through the component env endpoints using the other application's configuration, registries and deployment infrastructure.","summary":"OpsTree BuildPiper before 2.7.0 lets a logged-in user attach another application's environment to their own service by supplying a foreign project_env_id. An attacker can then trigger builds and deployments using the other application's registries and deployment infrastructure.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"BuildPiper","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["buildpiper","ci-cd","other","self-hosted"],"not_affected_if":["single-tenant-deployment","version-2.7.0-or-later"],"how_to_check":"- Check the BuildPiper version in use; affected versions are those before `2.7.0`","fix":"- OpsTree BuildPiper: `2.7.0` (fixed version per NVD description)","status":"open","published_at":"2026-11-13T10:18:03+00:00","first_seen_at":"2026-11-13T10:47:29+00:00","triaged_at":"2026-11-13T10:52:48+00:00","updated_at":"2026-11-13T10:52:48+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-13T10:52:48Z","model":"claude-haiku-5-5","output":{"fix":"- OpsTree BuildPiper: `2.7.0` (fixed version per NVD description)","reach":"network","title":"OpsTree BuildPiper: authenticated users can attach other apps' environments","impact":"high","summary":"OpsTree BuildPiper before 2.7.0 lets a logged-in user attach another application's environment to their own service by supplying a foreign project_env_id. An attacker can then trigger builds and deployments using the other application's registries and deployment infrastructure.","audience":"businesses","category":"other","nicknames":[],"who_cares":["buildpiper","self-hosted","ci-cd"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"attacker deploys using another app's registries and infrastructure","analyst_note":"Confirm the affected version range and whether a vendor advisory exists; the only linked source is a third-party VulnCheck advisory page.","how_to_check":"- Check the BuildPiper version in use; affected versions are those before `2.7.0`\n- unknown","plain_action":"","product_name":"BuildPiper","needs_analyst":true,"not_affected_if":["single-tenant-deployment","version-2.7.0-or-later"],"who_is_affected":"Teams running a self-hosted OpsTree BuildPiper instance where more than one application or team shares the platform. Any authenticated user can reach the component env endpoints, so a single-tenant deployment with only trusted users is less exposed. The sources do not say which configurations are default.","user_interaction":"no","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000745,"input_tokens":4593,"output_tokens":571,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-127078':12A,15A '-2026':11A,14A '2.7.0':28B,71C 'allow':78C 'anoth':36B,83C 'app':8A 'applic':37B,62B,84C,114C 'attach':6A,35B,82C 'attack':52B,97C 'authent':3A,79C 'author':74C 'build':56B,103C 'buildpip':2A,17B,26B,69C 'buildpiper':16A 'bypass':75C 'cd':20B 'ci':19B,100C 'ci-cd':18B 'compon':108C 'configur':99C,116C 'contain':72C 'cve':10A,13A 'deploy':58B,66B,105C,119C 'endpoint':110C 'env':49B,95C,109C 'environ':9A,39B,86C 'foreign':47B,93C 'host':24B 'id':50B,96C 'infrastructur':67B,120C 'let':29B 'log':32B 'logged-in':31B 'opstre':1A,25B,68C 'project':48B,94C 'registri':64B,117C 'self':23B 'self-host':22B 'servic':43B,89C 'suppli':45B,91C 'trigger':55B,102C 'use':59B,111C 'user':4A,34B,80C 'vulner':76C","nicknames":[],"mitigations":[],"who_affected":"Teams running a self-hosted OpsTree BuildPiper instance where more than one application or team shares the platform. Any authenticated user can reach the component env endpoints, so a single-tenant deployment with only trusted users is less exposed. The sources do not say which configurations are default.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["buildpiper"],"ptokens":["buildpiper"],"labels":["buildpiper","cicd","high","other","selfhosted","vendor"],"campaign_type":null,"search_a":"'-127078':12A,15A '-2026':11A,14A 'app':8A 'attach':6A 'authent':3A 'buildpip':2A 'buildpiper':16A 'cve':10A,13A 'environ':9A 'opstre':1A 'user':4A","search_b":"'2.7.0':28B 'anoth':36B 'applic':37B,62B 'attach':35B 'attack':52B 'build':56B 'buildpip':17B,26B 'cd':20B 'ci':19B 'ci-cd':18B 'deploy':58B,66B 'env':49B 'environ':39B 'foreign':47B 'host':24B 'id':50B 'infrastructur':67B 'let':29B 'log':32B 'logged-in':31B 'opstre':25B 'project':48B 'registri':64B 'self':23B 'self-host':22B 'servic':43B 'suppli':45B 'trigger':55B 'use':59B 'user':34B","search_c":"'2.7.0':71C 'allow':78C 'anoth':83C 'applic':84C,114C 'attach':82C 'attack':97C 'authent':79C 'author':74C 'build':103C 'buildpip':69C 'bypass':75C 'ci':100C 'compon':108C 'configur':99C,116C 'contain':72C 'deploy':105C,119C 'endpoint':110C 'env':95C,109C 'environ':86C 'foreign':93C 'id':96C 'infrastructur':120C 'opstre':68C 'project':94C 'registri':117C 'servic':89C 'suppli':91C 'trigger':102C 'use':111C 'user':80C 'vulner':76C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-13T10:18:03+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/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-2026-127078","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-127078","severity":null,"published_at":"2026-11-13T10:18:03+00:00","modified_at":"2026-11-13T10:18:03+00:00","first_seen_at":"2026-11-13T10:47:29+00:00","fetched_at":"2026-11-13T10:47:29+00:00","note":null}],"documents":[{"id":145282,"url":"https://www.vulncheck.com/advisories/opstree-buildpiper-before-2.7.0-authorization-bypass-via-project-env-id-parameter","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"}