CVE-2026-94588: CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in Proxmox pmg-api
CVE-2026-94588 is an argument injection vulnerability in the Proxmox pmg-api affecting versions 9.0.0 up to but not including 9.0.3. The flaw exists in the package changelog retrieval functionality where user input is improperly handled when passed to the apt-get command. Exploitation requires authentication but can be triggered via a CSRF-style attack. The vulnerability has a medium severity with a CVSS score of 4.4.
AI Analysis
Technical Summary
This vulnerability in Proxmox pmg-api (CVE-2026-94588) involves improper neutralization of argument delimiters (CWE-88) in the package changelog retrieval feature. Specifically, user-supplied input is passed unsafely to the underlying apt-get command, allowing argument injection. Although authentication is required, the vulnerability can be exploited through a Cross-Site Request Forgery (CSRF) style attack, potentially leading to limited confidentiality and integrity impacts.
Potential Impact
Successful exploitation could allow an authenticated attacker to inject arguments into the apt-get command executed by the pmg-api, potentially leading to unauthorized command execution with the privileges of the pmg-api process. The CVSS score of 4.4 reflects a medium severity with partial confidentiality and integrity impact but no availability impact.
Mitigation Recommendations
No official patch or fix is currently documented. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, mitigate risk by restricting access to the pmg-api to trusted users only and implementing protections against CSRF attacks such as anti-CSRF tokens or same-site cookies.
CVE-2026-94588: CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in Proxmox pmg-api
Description
CVE-2026-94588 is an argument injection vulnerability in the Proxmox pmg-api affecting versions 9.0.0 up to but not including 9.0.3. The flaw exists in the package changelog retrieval functionality where user input is improperly handled when passed to the apt-get command. Exploitation requires authentication but can be triggered via a CSRF-style attack. The vulnerability has a medium severity with a CVSS score of 4.4.
CVSS v3.1
Score 4.4medium
Affected software
Proxmox
pmg-api
pkg:github/proxmox/pmg-apiRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Proxmox pmg-api (CVE-2026-94588) involves improper neutralization of argument delimiters (CWE-88) in the package changelog retrieval feature. Specifically, user-supplied input is passed unsafely to the underlying apt-get command, allowing argument injection. Although authentication is required, the vulnerability can be exploited through a Cross-Site Request Forgery (CSRF) style attack, potentially leading to limited confidentiality and integrity impacts.
Potential Impact
Successful exploitation could allow an authenticated attacker to inject arguments into the apt-get command executed by the pmg-api, potentially leading to unauthorized command execution with the privileges of the pmg-api process. The CVSS score of 4.4 reflects a medium severity with partial confidentiality and integrity impact but no availability impact.
Mitigation Recommendations
No official patch or fix is currently documented. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, mitigate risk by restricting access to the pmg-api to trusted users only and implementing protections against CSRF attacks such as anti-CSRF tokens or same-site cookies.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-09-21T20:46:22.983Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab1abbb55bf5e2cf58b4681
Added to database: 09/21/2026, 22:12:11 UTC
Last enriched: 09/21/2026, 22:14:08 UTC
Last updated: 09/22/2026, 00:14:49 UTC
Views: 4
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