CVE-2026-18540

low Red Hat
CVSS v3 Base Score
3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score
0.2%
Exploitation probability in 30 days
Top 88% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Published: September 4, 2026 (6 days ago)
Last Modified: September 4, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in undici. An attacker-controlled upstream server can exploit a vulnerability in the retry interceptor, which incorrectly appends data to a ranged retry response. This can cause the response body to be longer than the Content-Length observed by the application. Consequently, an application relaying such a response to a downstream HTTP/1.1 peer without proper framing normalization may enable HTTP response splitting or desynchronization, allowing an attacker to inject arbitrary content into subsequent responses.

CWE

CWE-444

Affected Products

Exploit IntelligenceOpenShift PipelinesRed Hat AMQ Broker 7Red Hat Ansible Automation Platform 2Red Hat Build of Podman DesktopRed Hat Developer HubRed Hat Enterprise Linux 10Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9Red Hat Hardened Images

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 cna.openjsf.org 🔗 github.com