CVE-2022-34037

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) via a crafted URI. Note: This has been disputed as a bug, not a security vulnerability, in the Caddy web server that emerged when an administrator's bad configuration containing a malformed request URI caused the server to return an empty reply instead of a valid HTTP response to the client.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-125

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/caddyserver/caddy/issues/4775Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/caddyserver/caddy/issues/4775#issuecomment-1203388116
https://github.com/caddyserver/caddy/issues/4775Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/caddyserver/caddy/issues/4775#issuecomment-1203388116

Timeline

Published: Jul 22, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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