GHSA-vv5m-jxxh-4627

Insecure Preservation of SUID/SGID Bits during ZIP Extraction Leading to Potential Privilege Escalation

7.3 HighFix available

GHSA-vv5m-jxxh-4627 is a high vulnerability (CVSS 7.3) in zip, published October 9, 2026. No source lists public exploit code. Fixed in zip 9.0.0.

What does this mean?

Severity: 7.3 HighCVSS 3.1, OSV
Exploit chance: UnscoredNo EPSS score yet
Exploitation: None knownNot on CISA’s or ENISA’s lists
Fixed in: 9.0.0zip

Description

The zip crate preserves privileged Unix permission bits (SUID, SGID, and sticky bits) from ZIP external_attributes during extraction, instead of masking them to safe permission bits. If a privileged process (for example, root in an installer, CI/CD pipeline, or container build) extracts an attacker-controlled ZIP archive using ZipArchive::extract() or the stream extraction API, files can be created as setuid-root or setgid. This behavior allows the creation of SUID/SGID files during extraction, which can lead to local privilege escalation depending on the execution environment.

For further details see: https://github.com/zip-rs/zip2/security/advisories/GHSA-vv5m-jxxh-4627

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Affected packages

Affected packages
Package	Affected	Fixed
`zip` crates.io	0.0.0-0 up to 9.0.0	9.0.0

What each source reports

OSV Score usedRUSTSEC-2026-03677.3

Insecure Preservation of SUID/SGID Bits during ZIP Extraction Leading to Potential Privilege Escalation