{"id":"CVE-2026-127073","kind":"vulnerability","aliases":["CVE-2026-127073"],"related":[],"title":"BuildPiper: project users can gain Kubernetes cluster-admin via manifests","description":"OpsTree BuildPiper before 2.7.0 contains a privilege escalation vulnerability that allows project users to gain Kubernetes cluster-admin rights by submitting unrestricted manifests through the Additional Manifest feature. Attackers can deploy a ClusterRoleBinding binding a service account to cluster-admin, which the pipeline applies with cluster-wide credentials, granting control over all workloads and secrets.","summary":"OpsTree BuildPiper before 2.7.0 lets project users submit unrestricted manifests through its Additional Manifest feature. An attacker can deploy a ClusterRoleBinding granting cluster-admin, which the pipeline applies with cluster-wide credentials, giving control of all workloads and secrets.","severity":"critical","cvss":9.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["buildpiper","ci-cd","kubernetes","other"],"not_affected_if":["version-2.7.0-or-later"],"how_to_check":"- Check whether the BuildPiper version in use is below `2.7.0`.\n- Look for the Additional Manifest feature in BuildPiper project settings and whether the pipeline applies it to a cluster.","fix":"- BuildPiper: move to `2.7.0` or later.","status":"open","published_at":"2026-11-13T10:18:03+00:00","first_seen_at":"2026-11-13T10:47:28+00:00","triaged_at":"2026-11-13T10:48:11+00:00","updated_at":"2026-11-13T10:48:11+00:00","category":"other","confidence":0.8,"triage":{"at":"2026-11-13T10:48:11Z","model":"claude-haiku-5-5","output":{"fix":"- BuildPiper: move to `2.7.0` or later.","reach":"network","title":"BuildPiper: project users can gain Kubernetes cluster-admin via manifests","impact":"high","summary":"OpsTree BuildPiper before 2.7.0 lets project users submit unrestricted manifests through its Additional Manifest feature. An attacker can deploy a ClusterRoleBinding granting cluster-admin, which the pipeline applies with cluster-wide credentials, giving control of all workloads and secrets.","audience":"businesses","category":"other","nicknames":[],"who_cares":["buildpiper","kubernetes","ci-cd"],"confidence":0.8,"fix_status":"available","needs_auth":"yes","worst_case":"attacker gains cluster-admin, reads all secrets and controls workloads","analyst_note":"Confirm the affected version range and whether the Additional Manifest feature is on by default; check the vulncheck advisory for details.","how_to_check":"- Check whether the BuildPiper version in use is below `2.7.0`.\n- Look for the Additional Manifest feature in BuildPiper project settings and whether the pipeline applies it to a cluster.\n- unknown for other checks; the sources do not name specific commands or files.","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["version-2.7.0-or-later"],"who_is_affected":"BuildPiper installations before 2.7.0 that use the Additional Manifest feature and apply pipeline manifests to a Kubernetes cluster with cluster-wide credentials. Teams not running BuildPiper, or running it at 2.7.0 or later, are not affected by this description. Sources do not state other preconditions.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000775,"input_tokens":4622,"output_tokens":625,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-127073':14A,17A '-2026':13A,16A '2.7.0':26B,67C 'account':101C 'addit':35B,90C 'admin':9A,47B,82C,105C 'allow':74C 'appli':51B,109C 'attack':39B,93C 'bind':98C 'buildpip':1A,18B,24B,65C 'cd':21B 'ci':20B 'ci-cd':19B 'cluster':8A,46B,54B,81C,104C,112C 'cluster-admin':7A,45B,80C,103C 'cluster-wid':53B,111C 'clusterrolebind':43B,97C 'contain':68C 'control':58B,116C 'credenti':56B,114C 'cve':12A,15A 'deploy':41B,95C 'escal':71C 'featur':37B,92C 'gain':5A,78C 'give':57B 'grant':44B,115C 'kubernet':6A,22B,79C 'let':27B 'manifest':11A,32B,36B,87C,91C 'opstre':23B,64C 'pipelin':50B,108C 'privileg':70C 'project':2A,28B,75C 'right':83C 'secret':63B,121C 'servic':100C 'submit':30B,85C 'unrestrict':31B,86C 'user':3A,29B,76C 'via':10A 'vulner':72C 'wide':55B,113C 'workload':61B,119C","nicknames":[],"mitigations":[],"who_affected":"BuildPiper installations before 2.7.0 that use the Additional Manifest feature and apply pipeline manifests to a Kubernetes cluster with cluster-wide credentials. Teams not running BuildPiper, or running it at 2.7.0 or later, are not affected by this description. Sources do not state other preconditions.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["buildpiper","cicd","critical","kubernetes","other"],"campaign_type":null,"search_a":"'-127073':14A,17A '-2026':13A,16A 'admin':9A 'buildpip':1A 'cluster':8A 'cluster-admin':7A 'cve':12A,15A 'gain':5A 'kubernet':6A 'manifest':11A 'project':2A 'user':3A 'via':10A","search_b":"'2.7.0':26B 'addit':35B 'admin':47B 'appli':51B 'attack':39B 'buildpip':18B,24B 'cd':21B 'ci':20B 'ci-cd':19B 'cluster':46B,54B 'cluster-admin':45B 'cluster-wid':53B 'clusterrolebind':43B 'control':58B 'credenti':56B 'deploy':41B 'featur':37B 'give':57B 'grant':44B 'kubernet':22B 'let':27B 'manifest':32B,36B 'opstre':23B 'pipelin':50B 'project':28B 'secret':63B 'submit':30B 'unrestrict':31B 'user':29B 'wide':55B 'workload':61B","search_c":"'2.7.0':67C 'account':101C 'addit':90C 'admin':82C,105C 'allow':74C 'appli':109C 'attack':93C 'bind':98C 'buildpip':65C 'cluster':81C,104C,112C 'cluster-admin':80C,103C 'cluster-wid':111C 'clusterrolebind':97C 'contain':68C 'control':116C 'credenti':114C 'deploy':95C 'escal':71C 'featur':92C 'gain':78C 'grant':115C 'kubernet':79C 'manifest':87C,91C 'opstre':64C 'pipelin':108C 'privileg':70C 'project':75C 'right':83C 'secret':121C 'servic':100C 'submit':85C 'unrestrict':86C 'user':76C 'vulner':72C 'wide':113C 'workload':119C","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:H/VI:H/VA:H/SC:H/SI:H/SA:H/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-2026-127073","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-127073","severity":null,"published_at":"2026-11-13T10:18:03+00:00","modified_at":"2026-11-13T10:18:03+00:00","first_seen_at":"2026-11-13T10:47:28+00:00","fetched_at":"2026-11-13T10:47:28+00:00","note":null}],"documents":[{"id":145277,"url":"https://www.vulncheck.com/advisories/opstree-buildpiper-before-2.7.0-privilege-escalation-via-additional-manifest","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"}