CVE-2020-11724

Name: CVE-2020-11724
Creator: NVD / NIST
Published: 2020-04-12T21:15:10.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.60%

Last modified Jun 17, 2026

CVE-2020-11724 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in OpenResty before 1.15.8.4. ngx_http_lua_subrequest.c allows HTTP request smuggling, as demonstrated by the ngx.location.capture API.. EPSS estimates a 2.60% chance of exploitation in the next 30 days.

Description

An issue was discovered in OpenResty before 1.15.8.4. ngx_http_lua_subrequest.c allows HTTP request smuggling, as demonstrated by the ngx.location.capture API.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.60%

83.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Openresty	Openresty	< 1.15.8.4
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://github.com/openresty/lua-nginx-module/commit/9ab38e8ee35fc08a57636b1b6190dca70b0076faPatch, Third Party Advisory
https://github.com/openresty/openresty/blob/4e8b4c395f842a078e429c80dd063b2323999957/patches/ngx_http_lua-0.10.15-fix_location_capture_content_length_chunked.patchPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00014.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210129-0002/Third Party Advisory
https://www.debian.org/security/2020/dsa-4750Third Party Advisory
https://github.com/openresty/lua-nginx-module/commit/9ab38e8ee35fc08a57636b1b6190dca70b0076faPatch, Third Party Advisory
https://github.com/openresty/openresty/blob/4e8b4c395f842a078e429c80dd063b2323999957/patches/ngx_http_lua-0.10.15-fix_location_capture_content_length_chunked.patchPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00014.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210129-0002/Third Party Advisory
https://www.debian.org/security/2020/dsa-4750Third Party Advisory

Timeline

Published: Apr 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11724?

An issue was discovered in OpenResty before 1.15.8.4. ngx_http_lua_subrequest.c allows HTTP request smuggling, as demonstrated by the ngx.location.capture API.

How severe is CVE-2020-11724?

CVE-2020-11724 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.60% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11724?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-11724?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST