CVE-2026-30852
unknown
CVSS v3
—
CVSS v4 NEW
—
VIR risk
—
Description
Caddy's vars_regexp double-expands user input, leaking env vars and files in github.com/caddyserver/caddy
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 0 |
| debian | forky | fixed | 0 |
| debian | sid | fixed | 0 |
| debian | trixie | fixed | 0 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/caddyserver/caddy/v2/modules/caddyhttp | >=2.7.5,<2.11.2 | 2.11.2 |
| Go | github.com/caddyserver/caddy/v2 | >=2.7.5,<2.11.2 | 2.11.2 |
References
- https://security-tracker.debian.org/tracker/CVE-2026-30852
- https://github.com/caddyserver/caddy/security/advisories/GHSA-m2w3-8f23-hxxf
- https://nvd.nist.gov/vuln/detail/CVE-2026-30852
- https://github.com/caddyserver/caddy/pull/5408
- https://github.com/caddyserver/caddy
- https://github.com/caddyserver/caddy/releases/tag/v2.11.2
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.