CVE-2021-22960
llhttp: HTTP Request Smuggling when parsing the body of chunked requests
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 12, 2021
Updated · November 1, 2026
Description
An HTTP Request Smuggling (HRS) vulnerability was found in the llhttp library, used by Node.JS. During the parsing of chunked messages, the chunk size parameter was not validated properly. In situations where HTTP conversations are being proxied (such as proxy, reverse-proxy, load-balancer), an attacker can use this flaw to inject arbitrary messages through the proxy. The highest threat from this vulnerability is to confidentiality and integrity.
Statement
Red Hat Quay from version 3.4 consumes nodejs from RHEL, so security tracking is provided by the container health index on the customer portal [1]. Additionally there is no impact from this issue on Quay 3.3 and 3.2 because nodejs is only used at build time and is no longer shipped, starting with Quay 3.5 [2]. [1] https://catalog.redhat.com/software/containers/quay/quay-rhel8/600e03aadd19c7786c43ae49?container-tabs=security [2] https://issues.redhat.com/browse/PROJQUAY-1409 Therefore Quay component is marked as "Will not fix".
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE-444 · Inconsistent Interpretation of HTTP Requests