Vulnerability · Published Oct 25, 2026 · Assigned by VulnCheck

CVE-2026-116196Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url

Medium 5.3

In plain English

A medium-severity security flaw in rclone from rclone. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)<0.1%top 100.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Rclone before v1.75.2 contains a credential exposure vulnerability in the b2 backend that leaks the live account Authorization token and SSE-C keys on HTTP redirects from --b2-download-url hosts. Attackers can observe a same-host HTTPS-to-HTTP downgrade redirect to capture the cleartext B2 token, or receive cross-host redirects disclosing SSE-C customer encryption keys.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Alpine:v3.24	rclone	1.75.2-r0	ALPINE-CVE-2026-116196
Debian:12	rclone	no fix listed	DEBIAN-CVE-2026-116196
Debian:13	rclone	no fix listed	DEBIAN-CVE-2026-116196
Ubuntu:26.10	rclone	no fix listed	UBUNTU-CVE-2026-116196

Affected products (as reported)

Vendor	Product	Versions
rclone	rclone	0 – before 1.75.2

Weakness: CWE-319 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-gpw7-77cq-9f72) vendor-advisory
VulnCheck Advisory: Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url third-party-advisory