What is CVE-2026-79782?

CVE-2026-79782 is a low-severity vulnerability in Rclone, classified under Cleartext Transmission of Sensitive Information. CVSS score: 3.1/10. Published 2026-08-25.

How severe is CVE-2026-79782?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in Rclone

CVE-2026-79782

rclone before 1.74.4 fails to strip the X-Amz-Security-Token header when an S3 redirect changes scheme from HTTPS to HTTP on the same host. Attackers can intercept plaintext HTTP traffic to capture AWS STS session tokens sent in request headers.

Published 2026-08-25 · last modified 2026-09-10.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (2.4th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Rclone

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

github.com/rclone/rclone/security/advisories/GHSA-gx4c-2hqx-cw2r (vendor-advisory)
www.vulncheck.com/advisories/rclone-before-security-token-disclosure-via-https-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-79782?: CVE-2026-79782 is a low-severity vulnerability in Rclone, classified under Cleartext Transmission of Sensitive Information. CVSS score: 3.1/10. Published 2026-08-25.
How severe is CVE-2026-79782?: Low severity. CVSS v3 base score is 3.1 out of 10.