An issue in OpenResty lua-nginx-module v.0.10.26 and before allows a remote attacker to conduct HTTP request smuggling via a crafted HEAD r…

published 2025-04-22 18 mo ago modified 2026-09-08 2 mo ago also BIT-openresty-2024-33452 , EUVD-2024-31190

cvss: 7.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

An issue in OpenResty lua-nginx-module v.0.10.26 and before allows a remote attacker to conduct HTTP request smuggling via a crafted HEAD request.

Patch / fix

fixed in 1 distros 1

bitnami openresty 1.25.3

nginx Debian 14, Debian 13, Debian 12 1.22.0-3
libnginx-mod-http-lua Debian 12 1:0.10.23-1+deb12u1
libnginx-mod-http-lua Debian 14, Debian 13 1:0.10.27-1

debian advisories DEBIAN-CVE-2024-33452

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-33452 updated 2026-11-04 cvss 7.7

lua-nginx-module: HTTP request smuggling via a crafted HEAD request

Red Hat 3scale API Management Platform 2 3scale-amp-apicast-gateway-container
affected: workaround, no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-04-22)

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

portswigger.net https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn referenced PoC, tagged "exploit" by a source, unverified
benasin.space https://www.benasin.space/2025/03/18/OpenResty-lua-nginx-module-v0-10-26-HTTP-Request-Smuggling-in-HEAD-requests/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.7	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CNA	3.1	7.7	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
OSV	3.1	7.7	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem	package	affected	fixed in
bitnami	openresty	<1.25.3	1.25.3

Classification

Weakness

CWE-444 Inconsistent Interpretation of HTTP Requests

References

portswigger.net /research/http-desync-attacks-request-smuggling-reborn
exploit, third-party-advisory, advisory
benasin.space /2025/03/18/OpenResty-lua-nginx-module-v0-10-26-HTTP-Request-Smuggling-in-HEAD-requests/
exploit, third-party-advisory, advisory
lists.debian.org /debian-lts-announce/2025/06/msg00026.html
web
nvd.nist.gov /vuln/detail/CVE-2024-33452
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary