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CVE

CVE-2026-27976

Zed Extension Sandbox Escape via Tar Symlink Following
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CVE

CVE-2026-27976

Zed Extension Sandbox Escape via Tar Symlink Following

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 (writeablepathfrom_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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27976.json, https://github.com/zed-industries/zed/security/advisories/GHSA-59p4-3mhm-qm3r, https://nvd.nist.gov/vuln/detail/CVE-2026-27976

Severity

8.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.8
EPSS Probability
0.00106%
EPSS Percentile
0.28251%
Introduced Version
0
Fix Available
30154577e45db0431c88f48c4bff2e247d5f8b44

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