CVE-2026-79780CWE-200information-disclosure

CVE-2026-79780

Medium · published August 25, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
3.6
In the wild
Unconfirmed
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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
6.0 · 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
EPSS
0.00147 · 3.6th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-08-25T20:17Z
References (3)
https://github.com/rclone/rclone/security/advisories/GHSA-8mxv-9xhp-86h4 · [email protected]https://www.vulncheck.com/advisories/rclone-before-credential-exposure-via-s3-redirect · [email protected]https://github.com/rclone/rclone/security/advisories/GHSA-8mxv-9xhp-86h4 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 27 AUG 06:46Z
    EPSS moved — → 0%
    epss
  • 25 AUG 15:16Z
    rclone before v1.75.0 Credential Exposure via S3 Redirect
    cvelistv5