Upstream information
Description
Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature or public key. When verifying a Rekor entry, Cosign verifies the Rekor entry signature, and also compares the artifact's digest, the user's public key from either a Fulcio certificate or provided by the user, and the artifact signature to the Rekor entry contents. Without these comparisons, Cosign would accept any response from Rekor as valid. A malicious actor that has compromised a user's identity or signing key could construct a valid Cosign bundle by including any arbitrary Rekor entry, thus preventing the user from being able to audit the signing event. This issue has been patched in versions 2.6.2 and 3.0.4.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 | 5.5 | 5.5 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | High | High |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 Server 15 SP7 | cosign | Affected |
| SUSE Linux Enterprise Server 16.0 | cosign | Affected |
| SUSE Linux Enterprise Server 16.0 | vexctl | Not 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 | Not 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 15.6 | cosign | Affected |
| Products at an unknown state of their lifecycle. | ||
| Products | trivy | Not affected |
| Container Status | ||
| suse/cosign | cosign | Affected |
| private-registry/harbor-trivy-adapter | trivy | Not affected |
SUSE Timeline for this CVE
CVE page created: Sat Jan 10 10:00:10 2026CVE page last modified: Mon Jan 12 23:55:58 2026