GHSA-q6vm-xqc9-v3ff

Source

https://github.com/advisories/GHSA-q6vm-xqc9-v3ff

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-q6vm-xqc9-v3ff/GHSA-q6vm-xqc9-v3ff.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-q6vm-xqc9-v3ff

Aliases

Published

2026-07-28T20:16:52Z

Modified

2026-08-18T15:11:00Z

Severity

7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N CVSS Calculator

Summary

Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory

Details

Unarchive in pkg/utils/zip.go joined each archive entry name with the destination directory via filepath.Join and wrote the result without checking whether the resolved path stayed under the destination. A zip entry named ../../tmp/evil therefore landed at /tmp/evil. An attacker who could control a Package.Spec.Source.URL or Deployment.URL archive could induce the fetcher (running as the per-environment pod's fission-fetcher sidecar) to write files anywhere that process could reach: into other tenants' /packages/<ns>/ directories, into mounted secret/config volumes, or into the fetcher's own binary.

Affected

Project: github.com/fission/fission
Versions: all up to and including v1.24.0
Audited commit: 647c141
Component: pkg/utils/zip.go (Unarchive)
Configuration: default; triggered when the fetcher downloads and extracts a zip archive

Fix section (paste into the Fix / Patches field)

Fixed in v1.25.0 by:

PR #3444 (commit 55704aca) — Unarchive now opens an os.Root on the destination, validates each archive entry name (rejects absolute paths and .. traversal), and refuses symlink entries up front. The os.Root confines every mkdir / create to the destination in the kernel.

Regression coverage: TestUnarchiveZipSlip in pkg/utils/zip_test.go exercises parent-traversal, absolute-path, and symlink entries.

Database specific

{
    "cwe_ids":  [
        "CWE-22"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-28T20:16:52Z",
    "nvd_published_at":  "2026-06-10T18:17:13Z",
    "severity":  "HIGH"
}

References

Affected packages

Go / github.com/fission/fission

Package

Name: github.com/fission/fission; View open source insights on deps.dev
Purl: pkg:golang/github.com/fission/fission

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.25.0

Database specific

last_known_affected_version_range

"<= 1.24.0"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-q6vm-xqc9-v3ff/GHSA-q6vm-xqc9-v3ff.json"