CVE catalog
CVE-2026-88018
rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, rclone serve s3 configured with --auth-proxy but without --auth-key allow
- Severity
- Critical · CVSS 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.51% · Oct 25, 2026
rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, rclone serve s3 configured with --auth-proxy but without --auth-key allows authPairMiddleware to register any client-chosen accessKeyID with an empty ws.s3Secret. gofakes3 then verifies the request’s SigV4 signature against that same empty secret, while Server.auth passes the access key identifier as both the user and authentication value to the proxy without an independent per-identity secret. An unauthenticated network attacker can therefore choose an arbitrary access key, sign with an empty secret, and reach whatever backend the auth-proxy script resolves for that identity. This issue is fixed in version 1.75.1.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | rclone | sid | 1.75.2-2 | fixed |
| Debian | rclone | trixie | 1.60.1+dfsg-4 | vulnerable |
| Debian | rclone | bookworm | 1.60.1+dfsg-2 | not affected |
| Go | github.com/rclone/rclone | Not reported | 1.75.1 | fixed |
| Cpe | rclone | Not reported | 1.75.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | rclone | source | sid | 1.75.2-1 | not yet assigned | Not reported | [1147404] |
| Debian | rclone | source | trixie | (unfixed) | not yet assigned | Not reported | [1147404] |
| Debian | rclone | source | bookworm | Not affected | unimportant | Not reported | [1147404] |
| Go | github.com/rclone/rclone | go | Not reported | 1.75.1 | Not reported | GHSA-XWWR-4H3P-R22C | Not reported |
| Cpe | rclone | cpe | Not reported | 1.75.1 | Not reported | NVD-CVE-2026-88018 | Not reported |
Notes
[trixie] rclone: Minor issue
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [golang-github-rclone-rclone-dev]Affected
Source package: [rclone]
Details (2)
1.60.1+dfsg-4· all · trixieAffected
nvd · rclone · debian · 13
1.60.1+dfsg-4· all · trixieAffected
nvd · rclone · debian · 13
- [rclone]Affected
Details (2)
1.60.1+dfsg-4· amd64 · trixieAffected
nvd · rclone · debian · 13
1.60.1+dfsg-4· arm64 · trixieAffected
nvd · rclone · debian · 13
[Debian 12 (Bookworm)]
- [golang-github-rclone-rclone-dev]Not affected
Source package: [rclone]
Details (2)
1.60.1+dfsg-2· all · bookwormNot affected
nvd · rclone · debian · bookworm
1.60.1+dfsg-2· all · bookwormNot affected
nvd · rclone · debian · bookworm
- [rclone]Not affected
Source package: [rclone]
Details (2)
1.60.1+dfsg-2+b5· amd64 · bookwormNot affected
nvd · rclone · debian · bookworm
1.60.1+dfsg-2+b5· arm64 · bookwormNot affected
nvd · rclone · debian · bookworm
Observed:
References
- [https://github.com/advisories/GHSA-xwwr-4h3p-r22c]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-88018]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-88018]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-88018]
- [https://security-tracker.debian.org/tracker/CVE-2026-88018]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88018.json]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]