Upstream information
Description
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 SIGSTORE_NO_CACHE=true in the environment, migrate to https://github.com/sigstore/sigstore-go/tree/main/pkg/tuf, or upgrade to the latest sigstore/sigstore release.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 5.8 | 5.3 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Privileges Required | High | None |
| User Interaction | None | Required |
| Scope | Changed | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | High | High |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 6 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Attack Requirements | Present |
| Privileges Required | None |
| User Interaction | Passive |
| Vulnerable System Confidentiality Impact | None |
| Vulnerable System Integrity Impact | High |
| Vulnerable System Availability Impact | None |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | cosign | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | cosign | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | cosign | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | vexctl | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | vexctl | Affected |
| SUSE Linux Enterprise Server 15 SP7 | cosign | Affected |
| SUSE Linux Enterprise Server 16.0 | cosign | Affected |
| SUSE Linux Enterprise Server 16.0 | vexctl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | cosign | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | cosign | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | vexctl | Affected |
| openSUSE Leap 15.6 | cosign | Affected |
| openSUSE Leap 15.6 | vexctl | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | cosign | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | cosign | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | cosign | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | cosign | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | cosign | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | cosign | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | cosign | Affected |
| SUSE Linux Enterprise Server 15 SP4 | cosign | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | cosign | Affected |
| SUSE Linux Enterprise Server 15 SP5 | cosign | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | cosign | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | cosign | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | cosign | Affected |
| SUSE Manager Proxy 4.3 | cosign | Affected |
| SUSE Manager Proxy LTS 4.3 | cosign | Affected |
| SUSE Manager Retail Branch Server 4.3 | cosign | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | cosign | Affected |
| SUSE Manager Server 4.3 | cosign | Affected |
| SUSE Manager Server LTS 4.3 | cosign | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Desktop 15 SP4 | cosign | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | cosign | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | cosign | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | cosign | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | cosign | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | cosign | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | cosign | Affected |
| SUSE Linux Enterprise Server 15 SP6 | cosign | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | cosign | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | cosign | Affected |
| openSUSE Leap 15.4 | cosign | Affected |
| openSUSE Leap 15.5 | cosign | Affected |
| openSUSE Leap 15.5 | vexctl | Affected |
| Products at an unknown state of their lifecycle. | ||
| Products | trivy | Affected |
| Container Status | ||
| suse/cosign | cosign | Affected |
| private-registry/harbor-trivy-adapter | trivy | Affected |
SUSE Timeline for this CVE
CVE page created: Fri Jan 23 02:03:20 2026CVE page last modified: Fri Jan 23 16:05:46 2026