CVE-2026-97036VulnerabilityPublished 11 Nov 2026

On Darwin, building a malicious package that uses cgo could cause arbitrary code execution when using the Apple linker

Source GCVE Database

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Authoritative record:CVE-2026-97036· High

Not known to be exploited : upgrade to 1.27.4 or 1.26.11 soon.

Data as of 11 Nov 2026, 08:03 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in 1.27.4, 1.26.11

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-qxq7-88pj-2ph7

What to do

Upgrade cmd/go to 1.27.4 or 1.26.11.

Affected software

Product	Affected	Fixed in
Go toolchaincmd/go	Affected >=1.27.0-0 <1.27.4	Fixed in 1.27.4
Go toolchaincmd/go	Affected <1.26.11	Fixed in 1.26.11
Gocmd/go`pkg:golang/cmd/go`Other threats	Affected <1.26.11 >=1.27.0-0 <1.27.4	Fixed in 1.26.11 1.27.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

The Go command has been updated to disallow the problematic linker flags and patterns that enable this vulnerability. Users should ensure they are using a Go version that includes these restrictions to prevent exploitation. No additional action is required if the updated Go command is in use.

Description

On Darwin systems, a vulnerability exists where building a malicious package using cgo with certain linker flags can lead to arbitrary code execution. This occurs because the Apple linker recombines separated '-l' and 'to_library' arguments into a single flag that loads an arbitrary LTO plugin dynamic library at link time. The Go command has been updated to disallow these risky linker flags and patterns to prevent exploitation.

Impact

An attacker who can supply a malicious package with crafted cgo linker flags can achieve arbitrary code execution during the build process on Darwin systems. This could lead to compromise of the build environment or execution of unauthorized code.

Summary

The vulnerability affects Darwin platforms when building packages that use cgo and specify linker flags in '#cgo LDFLAGS' directives. Specifically, passing '-l to_library <path>' causes the Apple linker to recombine these into '-lto_library', which loads an arbitrary LTO plugin dynamic library at link time, enabling arbitrary code execution. To mitigate this, the Go command now rejects the use of '-l' followed by 'to_library', as well as other disallowed linker flags such as '-lazy_library', '-lazy_framework', '-load_hidden', '-library', and '-library-path'. It also checks recombined '-l' arguments against a list of disallowed flags and patterns.

References

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