GO-2026-6848

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Source

https://pkg.go.dev/vuln/GO-2026-6848

Import Source

https://vuln.go.dev/ID/GO-2026-6848.json

JSON Data

https://api.osv.dev/v1/vulns/GO-2026-6848

Aliases

CVE-2026-97043

Published

2026-11-11T02:51:11Z

Modified

2026-11-11T03:15:14Z

Summary

Unexpected code execution via escaped quotes in //go:cgo_ldflag in cmd/go and cmd/compile

Details

Building a malicious package that uses cgo could bypass "#cgo LDFLAGS" validation and cause unexpected code execution at build time, or cause the go command to panic, via crafted quoting in "//go:cgo_ldflag" directives.

When "cmd/cgo" generates "_cgo_gotypes.go", it quotes each "#cgo LDFLAGS" argument with strconv.Quote in a "//go:cgo_ldflag" directive, but "cmd/compile" and "cmd/go" parsed those directives by splitting on raw quote characters without handling backslash escapes or unquoting the string. This mismatch allowed disallowed linker flags or unvalidated linker search paths to be smuggled past the go command's flag checks and passed to the external linker. In addition, deduplicating LDFLAGS in the go command could panic with an out-of-bounds slice index when a prefix of the flag list matched near the end of the slice.

"cmd/compile" and "cmd/go" now properly handle backslash-escaped quotes and unquote "//go:cgo_*" pragma strings with strconv.Unquote, and the slice bounds check in processCgoOutputs has been fixed.

Database specific

{
    "review_status": "REVIEWED",
    "url": "https://pkg.go.dev/vuln/GO-2026-6848"
}

References

Affected packages

Go / toolchain

Package

Name: toolchain; View open source insights on deps.dev
Purl: pkg:golang/toolchain

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.26.11

Introduced

1.27.0-0

Fixed

1.27.4

Ecosystem specific

{
    "imports": [
        {
            "path": "cmd/go"
        },
        {
            "path": "cmd/compile"
        }
    ]
}

Database specific

source

"https://vuln.go.dev/ID/GO-2026-6848.json"