CVE-2026-116193
Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
- Record
CVE-2026-116193- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
EUVDEUVD-2026-109451
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
- Record
EUVD-2026-109451- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-rw84-9qf5-6h67
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav...
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
- Record
GHSA-rw84-9qf5-6h67- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
NVD
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
- Record
CVE-2026-116193- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSVALPINE-CVE-2026-116193
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
- Record
ALPINE-CVE-2026-116193- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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
Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
- Record
CVE-2026-116193- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-116193
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
- Record
UBUNTU-CVE-2026-116193- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVBIT-rclone-2026-116193 No score
Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests
Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.
- Record
BIT-rclone-2026-116193- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
rcloneAlpine:v3.24 |
1.64.0 up to 1.75.2-r0 | 1.75.2-r0 |
rcloneBitnami |
1.64.0 up to 1.75.2 | 1.75.2 |
rcloneUbuntu:18.04:LTS |
All versions, plus listed versions 1.36-31.36-3ubuntu0.11.36-3ubuntu0.2 |
None known |
rcloneUbuntu: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 |
rcloneUbuntu: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 less1.53.3-4ubuntu1.22.04.21.53.3-4ubuntu1.22.04.31.53.3-4ubuntu1.22.04.3+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 |
rcloneUbuntu: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 less1.60.1+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 |
rcloneUbuntu:26.10 |
All versions, plus listed versions 1.60.1+dfsg-4ubuntu31.69.3+dfsg-31.69.3+dfsg-3ubuntu1 |
None known |
rcloneUbuntu: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
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-116193 is a medium vulnerability (CVSS 6.9) in Rclone, published October 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. Fixed in rclone 1.75.2-r0.
References
github.com/rclone/rclone/security/advisories/GHSA-gj73-fh6v-92fj
vulncheck.com/advisories/rclone-1.64.0-before-1.75.2-serve-webdav-authentication-bypass-via-options-requests
nvd.nist.gov/vuln/detail/CVE-2026-116193
security.alpinelinux.org/vuln/CVE-2026-116193
ubuntu.com/security/CVE-2026-116193
cve.org/CVERecord?id=CVE-2026-116193