Medium [CVE-2026-90771] Prototype Pollution via custom messages
This medium-severity Red Hat Linux advisory covers CVE-2026-90771; related products: Red Hat Hardened Images, Gatekeeper 3, Migration Toolkit for Containers.
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Summary
Prototype Pollution via custom messages. Red Hat rates this moderate (CVSS 5.9).
Weakness: CWE-915. Red Hat lists fixing advisory RHSA-2026:67610 with package grafana13-1-main-13.1.3-0.9.hum1, grafana13-2-main-13.2.1-0.4.hum1, grafana12-4-main-12.4.10-0.3.hum1.
Affected products named by the advisory: Red Hat Hardened Images; Gatekeeper 3; Migration Toolkit for Containers; Red Hat Build of Podman Desktop; and 8 more.
Affected products named by the advisory: Red Hat Data Grid 8; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 4 more.
- < 17.13.8
- < 18.2.9
Official advisory · high-confidence parse· fetched 15 days ago·verify at source
- grafana13-1-main-13.1.3-0.9.hum1
- grafana13-2-main-13.2.1-0.4.hum1
- grafana12-4-main-12.4.10-0.3.hum1
- RHSA-2026:67610
Official advisory · high-confidence parse· fetched 15 days ago·verify at source
Mitigation checklist
- Upgrade joi to 17.13.8, 18.2.9, or later. Avoid passing untrusted data to Joi message configuration until upgraded.
Official advisory · high-confidence parse· fetched 15 days ago·verify at source
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