docker-socket-proxy through 0.5.0 Insufficient Access Control Granularity Exposes Container Filesystems
Summary
| CVE | CVE-2026-78122 |
|---|---|
| State | PUBLISHED |
| Assigner | VulnCheck |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-22 23:16:22 UTC |
| Updated | 2026-08-22 23:16:22 UTC |
| Description | docker-socket-proxy fails to properly gate read endpoints in the /containers Docker API namespace when the CONTAINERS environment variable is set. Attackers can use GET requests to /containers/{id}/archive, /containers/{id}/export, /containers/{id}/logs, and /containers/{id}/top to read arbitrary files and download entire container filesystems as tar archives. |
Risk And Classification
Primary CVSS: v4.0 8.3 HIGH from [email protected]
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/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
Problem Types: CWE-1220 | CWE-1220 Insufficient Granularity of Access Control
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 8.3 | HIGH | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 8.3 | HIGH | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N |
| 3.1 | [email protected] | Primary | 7.4 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
| 3.1 | CNA | CVSS | 7.4 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
CVSS v4.0 Breakdown
Attack Vector
AdjacentAttack Complexity
LowAttack Requirements
NonePrivileges Required
NoneUser Interaction
NoneConfidentiality
HighIntegrity
NoneAvailability
NoneSub Conf.
HighSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/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
CVSS v3.1 Breakdown
Attack Vector
AdjacentAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Tecnativa | Docker-socket-proxy | affected 0.5.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| gist.github.com/nedlir/e4f52f88a757f02c67db1fd5dd70d732 | [email protected] | gist.github.com | |
| www.vulncheck.com/advisories/docker-socket-proxy-through-insufficient-access-co... | [email protected] | www.vulncheck.com | |
| github.com/Tecnativa/docker-socket-proxy | [email protected] | github.com | |
| github.com/Tecnativa/docker-socket-proxy/pull/183 | [email protected] | github.com | |
| github.com/Tecnativa/docker-socket-proxy/blob/v0.5.0/haproxy.cfg | [email protected] | github.com | |
| github.com/Tecnativa/docker-socket-proxy/issues/182 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: nedlir (en)
There are currently no legacy QID mappings associated with this CVE.