CVE-2026-27976 – Zed Extension Sandbox Escape via Tar Symlink Following

CVE ID : CVE-2026-27976

Published : Feb. 26, 2026, 12:16 a.m. | 52 minutes ago

Description : Zed, a code editor, has an extension installer allows tar/gzip downloads. Prior to version 0.224.4, the tar extractor (`async_tar::Archive::unpack`) creates symlinks from the archive without validation, and the path guard (`writeable_path_from_extension`) only performs lexical prefix checks without resolving symlinks. An attacker can ship a tar that first creates a symlink inside the extension workdir pointing outside (e.g., `escape -> /`), then writes files through the symlink, causing writes to arbitrary host paths. This escapes the extension sandbox and enables code execution. Version 0.224.4 patches the issue.

Severity: 8.8 | HIGH

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