CVE-2026-84933

medium Red Hat
CVSS v3 Base Score
6.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
EPSS Score
0.2%
Exploitation probability in 30 days
Top 84% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Published: September 4, 2026 (6 days ago)
Last Modified: September 4, 2026
Vendor: Red Hat
Fix Available: ✓ Yes
Source: REDHAT

Description

A flaw was found in undici. The software's caching mechanism, when operating in shared cache mode, improperly stores responses that include 'Set-Cookie' headers. This oversight allows an untrusted server to inject cookies into cached responses. Consequently, sensitive cookie information from one user can be inadvertently disclosed to another user accessing the same cached content.

CWE

CWE-524

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

Fix Status

✅ Fix Available

References

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