Upstream information
Description
A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy (GOMODPROXY) or checksum database (GOSUMDB). A malicious module proxy can serve altered versions of the Go toolchain. When selecting a different version of the Go toolchain than the currently installed toolchain (due to the GOTOOLCHAIN environment variable, or a go.work or go.mod with a toolchain line), the go command will download and execute a toolchain provided by the module proxy. A malicious module proxy can bypass checksum database validation for this downloaded toolchain. Since this vulnerability affects the security of toolchain downloads, setting GOTOOLCHAIN to a fixed version is not sufficient. You must upgrade your base Go toolchain. The go tool always validates the hash of a toolchain before executing it, so fixed versions will refuse to execute any cached, altered versions of the toolchain. The go tool trusts go.sum files to contain accurate hashes of the current module's dependencies. A malicious proxy exploiting this vulnerability to serve an altered module will have caused an incorrect hash to be recorded in the go.sum. Users who have configured a non-trusted GOPROXY can determine if they have been affected by running "rm go.sum ; go mod tidy ; go mod verify", which will revalidate all dependencies of the current module. The specific flaw in more detail: The go command consults the checksum database to validate downloaded modules, when a module is not listed in the go.sum file. It verifies that the module hash reported by the checksum database matches the hash of the downloaded module. If, however, the checksum database returns a successful response that contains no entry for the module, the go command incorrectly permitted validation to succeed. A module proxy may mirror or proxy the checksum database, in which case the go command will not connect to the checksum database directly. Checksums reported by the checksum database are cryptographically signed, so a malicious proxy cannot alter the reported checksum for a module. However, a proxy which returns an empty checksum response, or a checksum response for an unrelated module, could cause the go command to proceed as if a downloaded module has been validated.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | CNA (CISA-ADP) |
|---|---|
| Base Score | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality Impact | High |
| Integrity Impact | High |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
Note from the SUSE Security Team on the go1.* package
SUSE only supports the current and the previous GO language releases. SUSE Bugzilla entry: 1264499 [NEW] No SUSE Security Announcements cross referenced.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 | go | Not affected |
| SUSE Linux Enterprise Desktop 15 SP7 | go1.25 | Affected |
| SUSE Linux Enterprise Desktop 15 SP7 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Desktop 15 SP7 | go1.26 | Affected |
| SUSE Linux Enterprise Desktop 15 SP7 | go1.26-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | go1.25 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | go1.25-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | go1.26 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | go1.26-openssl | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | go | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | go1.25 | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | go1.26 | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | go1.26-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP7 | go | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | go1.25 | Affected |
| SUSE Linux Enterprise Server 15 SP7 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP7 | go1.26 | Affected |
| SUSE Linux Enterprise Server 15 SP7 | go1.26-openssl | Affected |
| SUSE Linux Enterprise Server 16.0 | go | Not affected |
| SUSE Linux Enterprise Server 16.0 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server 16.1 | go | Not affected |
| SUSE Linux Enterprise Server 16.1 | go1.24-openssl | Ignore |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | go | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | go1.25 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | go1.26 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | go1.26-openssl | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | go | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | go | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | go1.24-openssl | Ignore |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | go1.25 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | go1.25-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | go1.26 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | go1.26-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | go1.25 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | go1.25-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | go1.26 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | go1.26-openssl | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP4 | go | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP5 | go | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP6 | go | Not affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP6 | go1.25 | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP6 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP4 | go | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | go | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | go1.25 | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | go1.26 | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | go1.26-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP5 | go | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | go | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | go1.25 | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | go1.26 | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | go1.26-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP6 | go | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | go1.25 | Affected |
| SUSE Linux Enterprise Server 15 SP6 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | go | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | go1.25 | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | go1.26 | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | go1.26-openssl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | go | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | go1.25 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | go1.26 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | go1.26-openssl | Affected |
| SUSE Manager Proxy 4.3 | go | Not affected |
| SUSE Manager Retail Branch Server 4.3 | go | Not affected |
| SUSE Manager Server 4.3 | go | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7.1 | go | Not affected |
| SUSE Enterprise Storage 7.1 | go1.25 | Affected |
| SUSE Enterprise Storage 7.1 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | go | Not affected |
| SUSE Linux Enterprise Desktop 15 SP4 | go | Not affected |
| SUSE Linux Enterprise Desktop 15 SP5 | go | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | go | Not affected |
| SUSE Linux Enterprise Desktop 15 SP6 | go1.25 | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | go1.25-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | go1.25 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | go1.25-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | go1.25 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | go1.25-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | go1.26 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | go1.26-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | go1.25 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | go1.25-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | go1.26 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | go1.26-openssl | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | go | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | go1.25 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | go | Not affected |
| SUSE Linux Enterprise Real Time 15 SP3 | go | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | go | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | go | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | go | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | go | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | go1.25 | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | go | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | go1.25 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | go | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | go1.25 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | go1.26 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | go1.26-openssl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | go | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | go1.25 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | go1.25-openssl | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | go1.26 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | go1.26-openssl | Affected |
| SUSE Manager Proxy 4.2 | go | Not affected |
| SUSE Manager Retail Branch Server 4.2 | go | Not affected |
| SUSE Manager Server 4.2 | go | Not affected |
| openSUSE Leap 15.3 | go | Not affected |
| openSUSE Leap 15.4 | go | Not affected |
| openSUSE Leap 15.5 | go | Not affected |
| openSUSE Leap 15.6 | go | Not affected |
| openSUSE Leap 15.6 | go1.25 | Affected |
| openSUSE Leap 15.6 | go1.25-openssl | Affected |
| openSUSE Leap 15.6 | go1.26 | Affected |
| openSUSE Leap 15.6 | go1.26-openssl | Affected |
SUSE Timeline for this CVE
CVE page created: Fri May 8 12:08:59 2026CVE page last modified: Fri May 8 21:24:27 2026