UBUNTU-CVE-2026-24137

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Source

https://ubuntu.com/security/CVE-2026-24137

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24137.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-24137

Upstream

CVE-2026-24137

Published

2026-01-23T00:00:00Z

Modified

2026-01-27T13:01:00.584360Z

Severity

5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

sigstore framework is a common go library shared across sigstore services and clients. In versions 1.10.3 and below, the legacy TUF client (pkg/tuf/client.go) supports caching target files to disk. It constructs a filesystem path by joining a cache base directory with a target name sourced from signed target metadata; however, it does not validate that the resulting path stays within the cache base directory. A malicious TUF repository can trigger arbitrary file overwriting, limited to the permissions that the calling process has. Note that this should only affect clients that are directly using the TUF client in sigstore/sigstore or are using an older version of Cosign. Public Sigstore deployment users are unaffected, as TUF metadata is validated by a quorum of trusted collaborators. This issue has been fixed in version 1.10.4. As a workaround, users can disable disk caching for the legacy client by setting SIGSTORENOCACHE=true in the environment, migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf, or upgrade to the latest sigstore/sigstore release.

References

Affected packages

Ubuntu:24.04:LTS / golang-github-sigstore-sigstore

Package

Name: golang-github-sigstore-sigstore
Purl: pkg:deb/ubuntu/golang-github-sigstore-sigstore@1.8.0-2?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.4.0-3

1.7.5-1

1.8.0-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.8.0-2",
            "binary_name": "golang-github-sigstore-sigstore-dev"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-24137.json"

Ubuntu:25.10 / golang-github-sigstore-sigstore