Lxd: security update (CVE-2026-48750)
A critical vulnerability (CVE-2026-48750) affects Incus, a system container and virtual machine manager, in versions prior to 7.2.0. The flaw involves the `record-output` parameter of the `/instances/$name/exec` endpoint, which stores command output in the `exec-output` directory. If this directory is a symbolic link, attackers can write output files to arbitrary locations, potentially leading to arbitrary command execution. This vulnerability is patched in version 7.2.0.
AI Analysis
Technical Summary
Incus versions before 7.2.0 have a vulnerability in the handling of the `record-output` parameter on the `/instances/$name/exec` endpoint. The output files (`exec_UUID.stdout` and `exec_UUID.stderr`) are stored in the `exec-output` directory of the instance. If `exec-output` is a symbolic link, these files can be written to arbitrary filesystem locations. Since the `.stdout` file can contain arbitrary content, this behavior can be exploited to achieve arbitrary command execution. The issue is addressed in Incus version 7.2.0.
Potential Impact
Successful exploitation allows an attacker with at least limited privileges (PR:L) to execute arbitrary commands on the host system with high impact on confidentiality, integrity, and availability. The vulnerability has a CVSS score of 9.9 (critical), indicating severe risk if exploited.
Mitigation Recommendations
Upgrade Incus to version 7.2.0 or later, which contains the official fix for this vulnerability. No other mitigation is required as the patch addresses the root cause.
Lxd: security update (CVE-2026-48750)
Description
A critical vulnerability (CVE-2026-48750) affects Incus, a system container and virtual machine manager, in versions prior to 7.2.0. The flaw involves the `record-output` parameter of the `/instances/$name/exec` endpoint, which stores command output in the `exec-output` directory. If this directory is a symbolic link, attackers can write output files to arbitrary locations, potentially leading to arbitrary command execution. This vulnerability is patched in version 7.2.0.
CVSS v3.1
Score 9.9critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Incus versions before 7.2.0 have a vulnerability in the handling of the `record-output` parameter on the `/instances/$name/exec` endpoint. The output files (`exec_UUID.stdout` and `exec_UUID.stderr`) are stored in the `exec-output` directory of the instance. If `exec-output` is a symbolic link, these files can be written to arbitrary filesystem locations. Since the `.stdout` file can contain arbitrary content, this behavior can be exploited to achieve arbitrary command execution. The issue is addressed in Incus version 7.2.0.
Potential Impact
Successful exploitation allows an attacker with at least limited privileges (PR:L) to execute arbitrary commands on the host system with high impact on confidentiality, integrity, and availability. The vulnerability has a CVSS score of 9.9 (critical), indicating severe risk if exploited.
Mitigation Recommendations
Upgrade Incus to version 7.2.0 or later, which contains the official fix for this vulnerability. No other mitigation is required as the patch addresses the root cause.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-73hr-m85f-64v9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-48750"]
- Ecosystems
- ["Go"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6a3ef79127e9c79719ff6ee7
Added to database: 06/26/2026, 22:05:05 UTC
Last enriched: 09/12/2026, 22:01:36 UTC
Last updated: 09/14/2026, 22:01:34 UTC
Views: 86
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