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CVE Vulnerability Details :
CVE-2026-39819
PUBLISHED
More InfoOfficial Page
Assigner-Go
Assigner Org ID-1bb62c36-49e3-4200-9d77-64a1400537cc
View Known Exploited Vulnerability (KEV) details
Published At-07 May, 2026 | 19:41
Updated At-08 May, 2026 | 21:29
Rejected At-
▼CVE Numbering Authority (CNA)
Invoking "go bug" follows symlinks in predictable temporary filenames in cmd/go

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.

Affected Products
Vendor
Go toolchain
Product
cmd/go
Collection URL
https://pkg.go.dev
Package Name
cmd/go
Default Status
unaffected
Versions
Affected
  • From 0 before 1.25.10 (semver)
  • From 1.26.0-0 before 1.26.3 (semver)
Problem Types
TypeCWE IDDescription
N/AN/ACWE-377: Insecure Temporary File
Type: N/A
CWE ID: N/A
Description: CWE-377: Insecure Temporary File
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Harshit Gupta (Mr HAX)
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://go.dev/issue/78584
N/A
https://go.dev/cl/763882
N/A
https://groups.google.com/g/golang-announce/c/qcCIEXso47M
N/A
https://pkg.go.dev/vuln/GO-2026-4978
N/A
Hyperlink: https://go.dev/issue/78584
Resource: N/A
Hyperlink: https://go.dev/cl/763882
Resource: N/A
Hyperlink: https://groups.google.com/g/golang-announce/c/qcCIEXso47M
Resource: N/A
Hyperlink: https://pkg.go.dev/vuln/GO-2026-4978
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
3.15.3MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found