How severe is CVE-2026-27976?

CVE-2026-27976 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-27976 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27976?

CVE-2026-27976 affects Zed. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27976?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27976 have an EU (EUVD) identifier?

Yes. CVE-2026-27976 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8778.

When was CVE-2026-27976 published?

CVE-2026-27976 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27976

CVE-2026-27976 is a high-severity vulnerability in Zed with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-61.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8778
Weakness: CWE-61
Affected product: Zed
Published: 2026-02-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-27976?: 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.
How severe is CVE-2026-27976?: CVE-2026-27976 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-27976 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27976?: CVE-2026-27976 affects Zed. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27976?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27976 have an EU (EUVD) identifier?: Yes. CVE-2026-27976 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8778.
When was CVE-2026-27976 published?: CVE-2026-27976 was published on 2026-02-26 and last updated on 2026-06-17.

References

https://github.com/zed-industries/zed/security/advisories/GHSA-59p4-3mhm-qm3r

Affected products (1)

cpe:2.3:a:zed:zed:*:*:*:*:*:*:*:*

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