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CVE-2025-68119

Unexpected code execution when invoking toolchain in cmd/go

Published: Jan 28, 2026Updated: Feb 6, 2026 Sources: CVE List NVD BDUCWE-787

Description

Downloading and building modules with malicious version strings can cause local code execution. On systems with Mercurial (hg) installed, downloading modules from non-standard sources (e.g., custom domains) can cause unexpected code execution due to how external VCS commands are constructed. This issue can also be triggered by providing a malicious version string to the toolchain. On systems with Git installed, downloading and building modules with malicious version strings can allow an attacker to write to arbitrary files on the filesystem. This can only be triggered by explicitly providing the malicious version strings to the toolchain and does not affect usage of @latest or bare module paths.

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

Affected Products

go toolchainoss-projectUSOSS Librariesaka golang, go compiler toolchain, cmd/go
golangoss-projectUSOSS Libraries
the go projectoss-projectOSS Librariesaka go, golang-google-protobuf, crypto

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

and 7 more references View all →

Timeline

Published
Jan 28, 2026
Last Updated
Feb 6, 2026

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