CVE-2026-63293

A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/canonical/lxd/security/advisories/GHSA-j825-cg34-5fr5	Vendor Advisory Exploit
https://github.com/canonical/lxd/security/advisories/GHSA-j825-cg34-5fr5	Vendor Advisory Exploit

Configurations

Configuration 1 (hide)

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-12 20:17

Updated : 2026-09-03 19:24

NVD link : CVE-2026-63293

Mitre link : CVE-2026-63293

CVE.ORG link : CVE-2026-63293

JSON object : View

Products Affected

canonical

lxd

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

{"id": "CVE-2026-63293", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63293", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-13T12:39:22.377281Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@ubuntu.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security@ubuntu.com", "affectedData": [{"repo": "https://github.com/canonical/lxd", "vendor": "Canonical", "product": "LXD", "versions": [{"status": "affected", "version": "4.0.0", "lessThan": "4.0.12", "versionType": "semver"}, {"status": "affected", "version": "5.0.0", "lessThan": "5.0.8", "versionType": "semver"}, {"status": "affected", "version": "5.21.0", "lessThan": "5.21.6", "versionType": "semver"}, {"status": "affected", "version": "6.0", "lessThan": "6.10", "versionType": "semver"}], "platforms": ["Linux"], "packageName": "LXD", "defaultStatus": "unaffected"}]}], "published": "2026-08-12T20:17:47.060", "references": [{"url": "https://github.com/canonical/lxd/security/advisories/GHSA-j825-cg34-5fr5", "tags": ["Vendor Advisory", "Exploit"], "source": "security@ubuntu.com"}, {"url": "https://github.com/canonical/lxd/security/advisories/GHSA-j825-cg34-5fr5", "tags": ["Vendor Advisory", "Exploit"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@ubuntu.com", "description": [{"lang": "en", "value": "CWE-59"}]}], "descriptions": [{"lang": "en", "value": "A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system."}], "lastModified": "2026-09-03T19:24:45.397", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "89DC62EE-69CD-4ACD-BB83-6A0635AC341C", "versionEndExcluding": "4.0.12", "versionStartIncluding": "4.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}