CVE-2026-5058VulnerabilityPublished 30 Mar 2026

ZDI-26-246: (0Day) aws-mcp-server Command Injection Remote Code Execution Vulnerability

Source Zero Day Initiative

Compare

Not known to be exploited.

Data as of 30 Oct 2026, 11:52 UTC

Severity

Critical

Rated Critical by Zero Day Initiative · No CVSS score from NVD or the CNA

EPSS: 1.8% chance of exploitation in 30 days – higher than 78% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
Public on cve.org; its publication date is not in this record
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 30 Oct 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.

remote

What to do

AI-suggested

The advisory recommends restricting interaction with the aws-mcp-server product to mitigate risk. Organizations should limit network exposure and access to the affected server until a vendor fix is released. Monitor vendor communications for updates on remediation.

Description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of aws-mcp-server. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 9.8. The following CVEs are assigned: CVE-2026-5058.

Impact

Successful exploitation allows remote attackers to execute arbitrary code with the privileges of the aws-mcp-server process, potentially leading to full system compromise. No authentication is required, increasing the risk of exploitation. The vulnerability affects confidentiality, integrity, and availability of the affected systems. There are no known exploits in the wild at the time of the advisory.

Summary

CVE-2026-5058 is a command injection vulnerability in aws-mcp-server that permits remote attackers to execute arbitrary code without authentication. The root cause is insufficient validation of user input before executing system calls related to the allowed commands list. This vulnerability has a critical CVSS score of 9.8, indicating high impact on confidentiality, integrity, and availability. The vendor has not issued a patch or official remediation, and the advisory suggests restricting access to the product as the main mitigation.

References

zerodayinitiative.com/advisories/ZDI-26-246/ (opens in a new tab)

Community reviews

Loading reviews…