High severity8.1NVD Advisory· Published Mar 7, 2026· Updated Jun 17, 2026
CVE-2026-30851
CVE-2026-30851
Description
Caddy is an extensible server platform that uses TLS by default. From version 2.10.0 to before version 2.11.2, forward_auth copy_headers does not strip client-supplied headers, allowing identity injection and privilege escalation. This issue has been patched in version 2.11.2.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxyGo | >= 2.10.0, < 2.11.2 | 2.11.2 |
Affected products
5cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*range: >=2.10.0,<2.11.2
- (no CPE)range: >= 2.10.0, < 2.11.2
- ghsa-coords3 versionspkg:golang/github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxypkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
>= 2.10.0, < 2.11.2+ 2 more
- (no CPE)range: >= 2.10.0, < 2.11.2
- (no CPE)range: < 0.0.20260317T205859-150000.1.152.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
6- github.com/caddyserver/caddy/pull/6608nvdIssue TrackingPatchWEB
- github.com/caddyserver/caddy/pull/7545nvdIssue TrackingPatchWEB
- github.com/caddyserver/caddy/security/advisories/GHSA-7r4p-vjf4-gxv4nvdExploitMitigationPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-7r4p-vjf4-gxv4ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-30851ghsaADVISORY
- github.com/caddyserver/caddy/issues/6610nvdIssue TrackingWEB
News mentions
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