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

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

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

Source published

9 Oct 2026 12:00:00 UTC

Source modified

16 Oct 2026 23:30:02 UTC

Observed here

24 Oct 2026 13:19:54 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H