GRID::Machine versions through 0.127 for Perl allows arbitrary code execution via unsafe deserialization.
GRID::Machine provides Remote Procedure Calls (RPC) over SSH for Perl. The client connects to remote hosts to execute code on them. A compromised or malicious remote host can execute arbitrary code back on the client through unsafe deserialization in the RPC protocol.
read_operation() in lib/GRID/Machine/Message.pm deserialises values from the remote side using eval()
$arg .= '$VAR1';
my $val = eval "no strict; $arg"; # line 40-41
$arg is raw bytes from the protocol pipe. A compromised remote host can embed arbitrary perl in the Dumper-formatted response:
$VAR1 = do { system("..."); };
This executes on the client silently on every RPC call, as the return values remain correct.
This functionality is by design but the trust requirement for the remote host is not documented in the distribution.
GRID::Machine provides Remote Procedure Calls (RPC) over SSH for Perl. The client connects to remote hosts to execute code on them. A compromised or malicious remote host can execute arbitrary code back on the client through unsafe deserialization in the RPC protocol.
read_operation() in lib/GRID/Machine/Message.pm deserialises values from the remote side using eval()
$arg .= '$VAR1';
my $val = eval "no strict; $arg"; # line 40-41
$arg is raw bytes from the protocol pipe. A compromised remote host can embed arbitrary perl in the Dumper-formatted response:
$VAR1 = do { system("..."); };
This executes on the client silently on every RPC call, as the return values remain correct.
This functionality is by design but the trust requirement for the remote host is not documented in the distribution.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| CASIANO | GRID::Machine | unaffected |
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Fixes
Solution
No solution given by the vendor.
Workaround
There is no fix available. If used, only connect to trusted remote hosts.
References
History
Sun, 29 Mar 2026 02:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | GRID::Machine versions through 0.127 for Perl allows arbitrary code execution via unsafe deserialization. GRID::Machine provides Remote Procedure Calls (RPC) over SSH for Perl. The client connects to remote hosts to execute code on them. A compromised or malicious remote host can execute arbitrary code back on the client through unsafe deserialization in the RPC protocol. read_operation() in lib/GRID/Machine/Message.pm deserialises values from the remote side using eval() $arg .= '$VAR1'; my $val = eval "no strict; $arg"; # line 40-41 $arg is raw bytes from the protocol pipe. A compromised remote host can embed arbitrary perl in the Dumper-formatted response: $VAR1 = do { system("..."); }; This executes on the client silently on every RPC call, as the return values remain correct. This functionality is by design but the trust requirement for the remote host is not documented in the distribution. | |
| Title | GRID::Machine versions through 0.127 for Perl allows arbitrary code execution via unsafe deserialization | |
| Weaknesses | CWE-502 CWE-95 |
|
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-03-29T00:23:56.336Z
Reserved: 2026-03-25T14:56:47.454Z
Link: CVE-2026-4851
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-03-29T01:15:56.967
Modified: 2026-03-29T01:15:56.967
Link: CVE-2026-4851
Redhat
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OpenCVE Enrichment
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