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CVE-2026-39819

Invoking "go bug" follows symlinks in predictable temporary filenames in cmd/go

Published: May 7, 2026Updated: May 13, 2026 Sources: CVE List NVD BDUCWE-59
5.3MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 92.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

The "go bug" command writes to two files with predictable names in the system temporary directory (for example, "/tmp"). An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:UC:LI:HA:N
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-59

Affected Products

Go toolchain
oss-project·USaka go compiler toolchain, cmd/go, golang
cmd/goLibrary
OSS Libraries / go
golang
oss-project·US
go
OSS Libraries
The Go Project
oss-projectaka go, crypto, golang-google-protobuf
Go
OSS Libraries

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://go.dev/issue/78584
go.dev
https://go.dev/cl/763882
go.dev
https://groups.google.com/g/golang-announce/c/qcCIEXso47M
groups.google.com
and 1 more references View all →

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