Vulnerability · Published Sep 23, 2026 · Assigned by GitHub_M

CVE-2026-92284Caddy: Unbounded body buffer via {http.request.body} placeholder — memory exhaustion DoS

Medium 6.9

In plain English

A medium-severity resource allocation without limits in caddy from caddyserver. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)0.4%top 66.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Caddy is an extensible server platform that uses TLS by default. In version 2.11.3 and earlier, in modules/caddyhttp/replacer.go, resolving http.request.body reads the complete request body with an unbounded io.Copy before request-body middleware limits apply, allowing memory exhaustion and process termination.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	caddy	no fix listed	DEBIAN-CVE-2026-92284
Debian:13	caddy	no fix listed	DEBIAN-CVE-2026-92284
Debian:14	caddy	no fix listed	DEBIAN-CVE-2026-92284
Go	github.com/caddyserver/caddy/v2	2.11.4	GHSA-j8px-rmrx-76h9
Go	github.com/caddyserver/caddy/v2	2.11.4	GO-2026-6512
Ubuntu:26.10	caddy	no fix listed	UBUNTU-CVE-2026-92284

Affected products (as reported)

Vendor	Product	Versions
caddyserver	caddy	<= 2.11.3

Weakness: CWE-770 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

References

https://github.com/caddyserver/caddy/security/advisories/GHSA-j8px-rmrx-76h9 x_refsource_CONFIRM