7.8High

CVE-2026-94444Checksum bypass for golang.org/fips140 in cmd/go

Go toolchain cmd/go Published: 2026-10-09 01:53 (1 month ago)

Description

Previously, a user operating inside of a malicious Go project that defines a bogus golang.org/fips140 and operates a malicious GOMODPROXY the user chooses to connect to can serve an arbitrary module in its place. We now unpack the trusted ziphash for the bundled golang.org/fips140 module and construct its entry in the GOMODCACHE such that it can be verified by the toolchain.

Weakness (CWE): CWE-354

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
Go toolchain	cmd/go	< 1.26.9, 1.27.0-0 – < 1.27.2

References and patches

CVSS score

7.8High

Source: CISA-ADP · CVSS 3.1

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

All scores (2)

CISA-ADP	CVSS 3.1	7.8High
134c704f-9b21-4f2e-91b3-4a467353bcc0	CVSS 3.1	7.8High

EPSS (chance of exploitation in 30 days)

0.10%

higher than 1% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: total

Timeline

ID reserved2026-09-21
Published2026-10-09 01:53
Reached IP-DB2026-10-24 23:42
Last updated2026-10-15 19:18

Assigned by (CNA): Go
NVD status: Awaiting Analysis

View at source: CVE.org · NVD

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