rclone local: crafted Range request against a translated symlink panics (DoS)
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-248.
Summary
rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, backend/local with --links or links=true exposes symlink targets as .rclonelink objects, and fs.RangeOption.Decode can pass an unchecked positive Range start through Object.Open and openTranslatedLink. The function slices the target string as linkdst[offset:], so a Range start larger than the target length causes a deterministic slice-bounds panic when lib/http/serve exposes the object through HTTP or WebDAV. Go net/http normally recovers the panic per connection, causing request-level denial of service rather than terminating the entire process. This issue is fixed in version 1.75.1.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| rclone | rclone | before 1.75.1 | 1.75.1 | Patch available | CNA |
| — | github.com/rclone/rclone (Go) | before 1.75.1 | 1.75.1 | Patch available | GHSA-p6m2-r3w9-mpxw |
- rclone Vendorrclone Affected before 1.75.1 Fixed in 1.75.1 Patch available CNA
- github.com/rclone/rclone (Go) Vendor— Affected before 1.75.1 Fixed in 1.75.1 Patch available GHSA-p6m2-r3w9-mpxw
Remediation
- Fix · CNA rclone (rclone) Fixed in 1.75.1
- Fix · GHSA-p6m2-r3w9-mpxw github.com/rclone/rclone (Go) Fixed in 1.75.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Cryostat 4 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-88015
- 2026-10-03 Alias added: GHSA-p6m2-r3w9-mpxw
References
Advisory 2
More Rclone vulnerabilities
- TI-2026-60044 rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass CVSS 3.1CRITICAL 9.8
- TI-2026-29802 RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution CVSS 4.0CRITICAL 9.2
- TI-2026-29799 Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution CVSS 4.0CRITICAL 9.2
- TI-2026-42602 Path traversal in rclone CVSS 3.1HIGH 8.8
- TI-2026-39407 rclone: Unvalidated symlink target in local `--links` — arbitrary file write from an untrusted remote CVSS 3.1HIGH 8.8
- TI-2026-80211 Authentication bypass in rclone serve webdav via OPTIONS requests CVSS 4.0MEDIUM 6.9
Sources
- CVE-2026-88015 · CVE Program
- CVE-2026-88015 · NVD
- FIRST EPSS
- GHSA-p6m2-r3w9-mpxw · GitHub Advisory Database · CC BY 4.0
- CVE-2026-88015 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences