CVE-2026-79780

6.0 MEDIUM 0.1% exploit odds Fix listed Disclosure

What it is

rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved across scheme or host changes. Attackers observing network traffic from a trusted endpoint can capture reusable IBM IAM tokens on same-host HTTPS-to-HTTP downgrades or SSE-C keys on cross-origin redirects to access protected S3 objects.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of data exposure.
Exploit odds: 0.1% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-08-25 16:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-09-10 20:46 UTC Last updatedMost recent change to the record

Details

Published: 2026-08-25 16:17 UTC
Last modified: 2026-09-10 20:46 UTC
Exploit probability: 0.1% · EPSS, next 30 days
Weakness: CWE-200 · Information exposure
Record status: Awaiting Analysis

Attack profile CVSS 4.0 · 6.0

Attack vector: Adjacent network
Complexity: High
Attack requirements: Present
Privileges needed: None
User interaction: None
Confidentiality: High
Integrity: None
Availability: None

Raw vector

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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Fix and advisories

References

NVD record · CVE.org record