CVE-2026-1386

A UNIX symbolic link following issue in the jailer component in Firecracker version v1.13.1 and earlier and 1.14.0 on Linux may allow a local host user with write access to the pre-created jailer directories to overwrite arbitrary host files via a symlink attack during the initialization copy at jailer startup, if the jailer is executed with root privileges. To mitigate this issue, users should upgrade to version v1.13.2 or 1.14.1 or above.

CVSS v3 6.0 MEDIUM

6.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-003-AWS/	Vendor Advisory
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2	Release Notes Product
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1	Release Notes Product
https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgc	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:amazon:firecracker::::::::
	cpe:2.3:a:amazon:firecracker:1.14.0:-::::::
	cpe:2.3:a:amazon:firecracker:1.14.0:dev::::::

History

No history.

Information

Published : 2026-01-23 21:15

Updated : 2026-01-30 16:57

NVD link : CVE-2026-1386

Mitre link : CVE-2026-1386

CVE.ORG link : CVE-2026-1386

JSON object : View

Products Affected

amazon

firecracker

CWE

CWE-61

UNIX Symbolic Link (Symlink) Following

{"id": "CVE-2026-1386", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.0, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 0.8}], "cvssMetricV40": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.0, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-01-23T21:15:51.397", "references": [{"url": "https://aws.amazon.com/security/security-bulletins/2026-003-AWS/", "tags": ["Vendor Advisory"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/firecracker-microvm/firecracker/releases/tag/v1.13.2", "tags": ["Release Notes", "Product"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.1", "tags": ["Release Notes", "Product"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-36j2-f825-qvgc", "tags": ["Vendor Advisory"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "description": [{"lang": "en", "value": "CWE-61"}]}], "descriptions": [{"lang": "en", "value": "A UNIX symbolic link following issue in the jailer component in Firecracker version v1.13.1 and earlier and 1.14.0 on Linux may allow a local host user with write access to the pre-created jailer directories to overwrite arbitrary host files via a symlink attack during the initialization copy at jailer startup, if the jailer is executed with root privileges. \n\nTo mitigate this issue, users should upgrade to version v1.13.2 or 1.14.1 or above."}], "lastModified": "2026-01-30T16:57:56.657", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:amazon:firecracker:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F5711475-1683-4678-A801-CEE4DD77C20E", "versionEndExcluding": "1.13.2"}, {"criteria": "cpe:2.3:a:amazon:firecracker:1.14.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C1831DAD-F5BB-42AF-8CD4-EA9CD67C1247"}, {"criteria": "cpe:2.3:a:amazon:firecracker:1.14.0:dev:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0067E934-76C2-4FE3-AA7E-9BD7C8C98135"}], "operator": "OR"}]}], "sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}