CVE-2026-116196
Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url
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.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url
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.
- Record
CVE-2026-116196- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-319
- Updated
- 2026-11-04
EUVDEUVD-2026-109454
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.
- Record
EUVD-2026-109454- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-04
GitHub AdvisoriesGHSA-fq8p-rg92-hj4q
Rclone before v1.75.2 contains a credential exposure vulnerability in the b2 backend that leaks...
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.
- Record
GHSA-fq8p-rg92-hj4q- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/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:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-319
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-116196- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/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:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-319
- Updated
- 2026-11-04
OSVALPINE-CVE-2026-116196
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.
- Record
ALPINE-CVE-2026-116196- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/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
- 2026-11-05
OSV
Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url
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.
- Record
CVE-2026-116196- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - Weakness
- CWE-319
- Updated
- 2026-11-05
OSVDEBIAN-CVE-2026-116196
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.
- Record
DEBIAN-CVE-2026-116196- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/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
- 2026-11-05
OSVUBUNTU-CVE-2026-116196
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.
- Record
UBUNTU-CVE-2026-116196- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVBIT-rclone-2026-116196 No score
Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url
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.
- Record
BIT-rclone-2026-116196- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
rcloneAlpine:v3.24 |
before 1.75.2-r0 | 1.75.2-r0 |
rcloneBitnami |
before 1.75.2 | 1.75.2 |
rcloneDebian:12 |
All versions, plus listed versions 1.60.1+dfsg-21.60.1+dfsg-31.60.1+dfsg-41.65.0+dfsg-11.65.0+dfsg-2 Show 5 moreShow less1.69.3+dfsg-11.69.3+dfsg-21.69.3+dfsg-31.75.2-11.75.2-2 |
None known |
rcloneDebian:13 |
All versions, plus listed versions 1.60.1+dfsg-41.65.0+dfsg-11.65.0+dfsg-21.69.3+dfsg-11.69.3+dfsg-21.69.3+dfsg-31.75.2-11.75.2-2 |
None known |
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 |
|---|---|---|
| facts | EUVD | |
| 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-2026-116196 is a medium vulnerability (CVSS 6.0) in Rclone, published October 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.06%, the 0th percentile. Fixed in rclone 1.75.2-r0.
References
github.com/rclone/rclone/security/advisories/GHSA-gpw7-77cq-9f72
vulncheck.com/advisories/rclone-before-1.75.2-b2-credential-leak-on-redirect-via-b2-download-url
nvd.nist.gov/vuln/detail/CVE-2026-116196
security.alpinelinux.org/vuln/CVE-2026-116196
security-tracker.debian.org/tracker/CVE-2026-116196
ubuntu.com/security/CVE-2026-116196
cve.org/CVERecord?id=CVE-2026-116196