CVE-2026-88015 rclone local: crafted Range request against a translated symlink panics (DoS)
Attackers can cause a denial of service in rclone's local backend by sending crafted Range requests when symlink support is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-88015?
CVE-2026-88015 is a medium-severity denial of service vulnerability in rclone, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-88015?
4 open source packages ship an affected version, including github.com/rclone/rclone and rclone. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/rclone/rclone Go | All versions | 1.75.1 |
github.com/rclone/rclone Go | All versions | 1.75.1 |
github.com/rclone/rclone Go | All versions | 1.75.1 |
rclone Bitnami | All versions | 1.75.1 |
Products include Rclone Rclone.
How do I fix CVE-2026-88015?
Upgrade github.com/rclone/rclone to 1.75.1 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-88015 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88015 exists.
Other vulnerabilities in rclone
- CVE-2026-88018 rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass
- CVE-2026-49980 Rclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix
- CVE-2026-41179 RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution
- CVE-2026-41176 Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution
- CVE-2026-59733 rclone `serve restic --private-repos` authorization bypass: `..` in the URL path lets an authenticated user read, overwrite and delete other users' repositories
Sources
Also known as BIT-rclone-2026-88015, DEBIAN-CVE-2026-88015, GHSA-p6m2-r3w9-mpxw, GO-2026-6461, MINI-3qcq-hm4q-w79g, MINI-77rg-43h3-9964 and 7 more.