Medium [CVE-2026-79779] Credential exposure via HTTPS-to-HTTP redirect downgrade.
This medium-severity Red Hat Linux advisory covers CVE-2026-79779 affecting Cryostat 4, Red Hat Advanced Cluster Management for Kubernetes 2.
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Summary
rclone versions before v1.75.0 fail to reject transport downgrades in redirect handling, allowing Basic authorization and Cookie headers to be replayed over plaintext HTTP after same-host HTTPS-to-HTTP redirects.
An on-path attacker observing the plaintext hop can capture and reuse credentials to perform WebDAV operations with the compromised account's permissions. A flaw was found in rclone.
This Moderate impact flaw in rclone allows an on-path attacker to capture credentials by exploiting improper handling of HTTPS-to-HTTP redirects on the same host. Exploitation requires the attacker to be positioned on the network path between the client and the server.
Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-523.
Affected Red Hat products: Cryostat 4; Red Hat Advanced Cluster Management for Kubernetes 2. Red Hat does not currently list a fixing RHSA for this CVE.
- < 75.0
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
Mitigation checklist
- Until packages are updated, avoid using rclone WebDAV remotes against servers or gateways that issue HTTPS-to-HTTP redirects. Prefer remotes that remain on HTTPS for the full request path, and do not send Basic authentication or session cookies through intermediaries that can downgrade the TLS connection.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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