CVE-2026-4851Network attack vector

Remote code execution via eval-based deserialization

Published Mar 29, 2026 · Updated Mar 29, 2026

Code injection in Casiano Rodriguez-Leon's GRID::Machine 0 through 0.127 allows remote attackers to execute arbitrary code via RPC responses. The read_operation() routine in lib/GRID/Machine/Message.pm appends a Dumper value marker to raw protocol bytes and passes the resulting string to Perl eval without neutralizing embedded code. Exploitation requires control of an SSH-connected remote host, and each RPC response can execute silently in the client process while preserving expected return values.

CVSS severity9.8
Critical
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Casiano Rodriguez-Leon's GRID::Machine 0 through 0.127 allows remote attackers to execute arbitrary code via RPC responses. The read_operation() routine in lib/GRID/Machine/Message.pm appends a Dumper value marker to raw protocol bytes and passes the resulting string to Perl eval without neutralizing embedded code. Exploitation requires control of an SSH-connected remote host, and each RPC response can execute silently in the client process while preserving expected return values.

The record

CVE
CVE-2026-4851
Published
Mar 29, 2026
Updated
Mar 29, 2026
Vendor
Casiano Rodriguez-Leon
Product
GRID::Machine
Classifications
CWE-95, CWE-502, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.127

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Casiano Rodriguez-Leon · GRID::Machineversion=0 <=0.127

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
CWE-502Deserialization of Untrusted Data
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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