6

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

Analyzed
AliasesDEBIAN-CVE-2026-116196UBUNTU-CVE-2026-116196ALPINE-CVE-2026-116196
Published 25-10-2026Last modified 25-10-2026

Vulnerability summary

CVE-2026-116196 is a medium (CVSS 6.0) vulnerability in rclone. EPSS estimates a 0.06% chance of exploitation in the next 30 days, higher than 0% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.0/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.06%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 25-10-2026
    PublishedVulnerability first disclosed.

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.

CVSS metrics

8 scores · 5 sources · 2 versions

EPSS trend

Probability

0.06%

Chance of exploitation in the next 30 days

Percentile

0%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

26-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • rclone< 1.75.2-r0
Debian1 product
  • rcloneAll versions (No fix recorded)
Rclone1 product
Ubuntu1 product
  • rcloneAll versions (No fix recorded)

4 vendors · 4 products

References

6 links