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CVE-2026-116187

Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads

6.1 MediumFix available

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
Low

Exploit likelihood

0.14%Unchanged since Oct 26, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.1

Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Record
CVE-2026-116187
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
5.0 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-639
Updated
2026-11-02
EUVDEUVD-2026-109445 6.1

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Record
EUVD-2026-109445
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-8qg9-895h-w83f 6.1

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 -...

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Record
GHSA-8qg9-895h-w83f
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/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
CVSS 3.1
5.0 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-639
Updated
2026-11-02
NVD 6.1

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Record
CVE-2026-116187
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/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
CVSS 3.1
5.0 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-639
Updated
2026-11-02
OSVALPINE-CVE-2026-116187 6.1

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Record
ALPINE-CVE-2026-116187
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/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
Updated
2026-11-03
OSV 6.1

Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Record
CVE-2026-116187
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-639
Updated
2026-11-02
OSVUBUNTU-CVE-2026-116187 6.1

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Record
UBUNTU-CVE-2026-116187
CVSS 4.0
6.1 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
5.0 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVBIT-rclone-2026-116187 No score

Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

Record
BIT-rclone-2026-116187
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
rclone
Alpine:v3.24
 1.68.0 up to 1.75.2-r0
1.75.2-r0
rclone
Bitnami
 1.68.0 up to 1.75.2
1.75.2
rclone
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.36-31.36-3ubuntu0.11.36-3ubuntu0.2
 None known
rclone
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
1.47.0+ex1-61.47.0+ex1-71.49.5-21.49.5-31.50.2-21.50.2-2ubuntu0.11.50.2-2ubuntu0.21.50.2-2ubuntu0.2+esm1
 None known
rclone
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
1.53.3-11.53.3-21.53.3-41.53.3-4ubuntu11.53.3-4ubuntu1.22.04.1
Show 7 moreShow less
1.53.3-4ubuntu1.22.04.21.53.3-4ubuntu1.22.04.31.53.3-4ubuntu1.22.04.3+esm11.53.3-4ubuntu1.22.04.41.53.3-4ubuntu1.22.04.4+esm11.53.3-4ubuntu1.22.04.51.53.3-4ubuntu1.22.04.5+esm1
 None known
rclone
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
1.60.1+dfsg-2build11.60.1+dfsg-31.60.1+dfsg-3ubuntu0.24.04.11.60.1+dfsg-3ubuntu0.24.04.21.60.1+dfsg-3ubuntu0.24.04.3
Show 6 moreShow less
1.60.1+dfsg-3ubuntu0.24.04.41.60.1+dfsg-3ubuntu0.24.04.4+esm11.60.1+dfsg-3ubuntu0.24.04.51.60.1+dfsg-3ubuntu0.24.04.5+esm11.60.1+dfsg-3ubuntu0.24.04.61.60.1+dfsg-3ubuntu0.24.04.6+esm1
 None known
rclone
Ubuntu:26.10
 All versions, plus listed versions
1.60.1+dfsg-4ubuntu31.69.3+dfsg-31.69.3+dfsg-3ubuntu1
 None known
rclone
Ubuntu:Pro:26.04:LTS
 All versions, plus listed versions
1.60.1+dfsg-4ubuntu21.60.1+dfsg-4ubuntu31.60.1+dfsg-4ubuntu3.11.60.1+dfsg-4ubuntu3.1+esm11.60.1+dfsg-4ubuntu3.21.60.1+dfsg-4ubuntu3.2+esm1
 None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-116187 is a medium vulnerability (CVSS 6.1) in Rclone, published October 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.14%, the 3rd percentile. Fixed in rclone 1.75.2-r0.

References

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