{"id":"EUVD-2026-114452","revision":"d72ab971b0164d7f90255907cd8edb16","records":[{"revision":"d72ab971b0164d7f90255907cd8edb16","observedAt":"2026-11-07T13:28:27.87+00:00","statement":{"source":"euvd","id":"EUVD-2026-114452","aliases":["CVE-2026-62847","GHSA-m6wq-39m7-9xpp"],"title":"Metalama is a Roslyn-based open-source patterns and architecture toolkit for C#. Prior to 2025.1.18, 2026.0.25 and 2026.1.19, Metalama.Framework and Metalama.Tool load and execute compile-time assemblies, auxiliary executable tools and embe…","description":"Metalama is a Roslyn-based open-source patterns and architecture toolkit for C#. Prior to 2025.1.18, 2026.0.25 and 2026.1.19, Metalama.Framework and Metalama.Tool load and execute compile-time assemblies, auxiliary executable tools and embedded helper assemblies from predictable temporary directories. On `Linux` and `macOS`, the default `Path.GetTempPath()` location is world-writable, and existing artifacts are trusted based on sentinel or `.completed` marker files rather than integrity verification. A local unprivileged user on a shared machine or CI/build agent can pre-create the deterministic directory structure and plant a malicious DLL with the matching sentinel. When a higher-privileged developer or build account subsequently builds, Metalama skips regeneration and executes the planted artifact in the compiler, IDE or MSBuild process as the building user. This permits cross-user privilege escalation, reading source and secrets, supply-chain tampering with build output, or disrupting builds. Default Windows per-user temporary directories are protected by ACLs and are not affected. Deployer-selected insecure cache locations are outside the vulnerability's scope. This issue is fixed in versions 2025.1.18, 2026.0.25 and 2026.1.19.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","score":8.2,"severity":null}],"references":["https://github.com/metalama/Metalama/security/advisories/GHSA-m6wq-39m7-9xpp","https://github.com/metalama/Metalama/pull/1650","https://github.com/metalama/Metalama/commit/09911349a916e82194b1cfaa6d0a38acad928fc9","https://github.com/metalama/Metalama/commit/92c4feecfce86d18fcb007ab6d3a1b4383326a2e","https://github.com/metalama/Metalama/releases/tag/release/2025.1.18","https://github.com/metalama/Metalama/releases/tag/release/2026.0.25","https://github.com/metalama/Metalama/releases/tag/release/2026.1.19"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-114452","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 30, 2026, 8:23:50 PM","dateUpdated":"Oct 30, 2026, 10:13:12 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-114452","identifiers":["EUVD-2026-114452","CVE-2026-62847","GHSA-m6wq-39m7-9xpp"]},"retained":false,"historicalAffected":[]}],"coverage":[]}