CVE-2026-30852
Caddy's vars_regexp double-expands user input, leaking env vars and files in github.com/caddyserver/caddy
EPSS 0.02%
Description
Caddy's vars_regexp double-expands user input, leaking env vars and files in github.com/caddyserver/caddy
How to fix CVE-2026-30852
To remediate CVE-2026-30852, upgrade the affected package to a fixed version below.
- Go/github.com/caddyserver/caddy/v2—upgrade to 2.11.2 or later
- Go/github.com/caddyserver/caddy/v2/modules/caddyhttp—upgrade to 2.11.2 or later
Is CVE-2026-30852 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 2.7.5, < 2.11.2
- >= 2.7.5, < 2.11.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P |