{"affected":[{"defaultStatus":"unaffected","product":"BuildPiper","source":"CNA: VulnCheck","vendor":"OpsTree Solutions","versions":[{"lessThan":"2.7.0","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-127081","cwes":["CWE-639"],"description":"OpsTree BuildPiper before 2.7.0 contains an authorization bypass vulnerability that allows authenticated users to link pipeline stages to environments of other projects by supplying a foreign project_env_id. Attackers can submit another project's environment identifier to the POST /api/v1/pipeline/{pipeline_id}/stages/ endpoint, persisting cross-project associations that bypass project separation.","epss":{"date":"2026-11-13","percentile":0.29961,"score":0.00358},"exploits":[{"kind":"exploit","source":"CNA: VulnCheck","url":"https://gist.github.com/neelkotnis/0f4aaf3d9ab99950c7f643546fd7d713"}],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: VulnCheck","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","version":"4.0"},{"score":4.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},{"score":5.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","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","version":"4.0"},{"score":4.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}],"modifiedAt":1794594742758,"publishedAt":1794562460852,"references":[{"source":"CNA: VulnCheck","tags":["technical-description","exploit"],"url":"https://gist.github.com/neelkotnis/0f4aaf3d9ab99950c7f643546fd7d713"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://www.buildpiper.io/"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/opstree-buildpiper-before-2.7.0-authorization-bypass-via-pipeline-stage-project-env-id"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://gist.github.com/neelkotnis/0f4aaf3d9ab99950c7f643546fd7d713"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.buildpiper.io/"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/opstree-buildpiper-before-2.7.0-authorization-bypass-via-pipeline-stage-project-env-id"}],"remediation":[],"revision":"a7ac47c50cac6bc22509d02953455bbabd9e522ceaed1ae4e8ee22ce9b73e4a0","sources":[{"modifiedAt":1794594742758,"name":"CNA: VulnCheck","retrievedAt":1794597900773,"url":"https://www.cve.org/CVERecord?id=CVE-2026-127081"},{"modifiedAt":1794584724843,"name":"NVD","retrievedAt":1794593945928,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-127081"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794597921466,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-127081"}],"ssvc":{"assessedAt":1794594697112,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpsTree BuildPiper before 2.7.0 Authorization Bypass via Pipeline Stage project_env_id","updatedAt":1794597921466}