Vulnerability in Tecnativa Docker-Socket-Proxy
CVE-2026-78122
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gist.github.com/nedlir/e4f52f88a757f02c67db1fd5dd70d732 (exploit)
- github.com/Tecnativa/docker-socket-proxy (product)
- github.com/Tecnativa/docker-socket-proxy/blob/v0.5.0/haproxy.cfg (technical-description)
- github.com/Tecnativa/docker-socket-proxy/issues/182 (issue-tracking)
- github.com/Tecnativa/docker-socket-proxy/pull/183 (issue-tracking, patch)
- www.vulncheck.com/advisories/docker-socket-proxy-through-insufficient-access-co… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-78122?
- CVE-2026-78122 is a high-severity vulnerability in Tecnativa Docker-Socket-Proxy, classified under CWE-1220. CVSS score: 7.4/10. Published 2026-08-22.
- How severe is CVE-2026-78122?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2026-78122 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.