CVE-2026-49980: Rclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix
Vulnerability summary
CVE-2026-49980 is a critical (CVSS 9.8) vulnerability in rclone. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 55.9% of scored vulnerabilities.
Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 5Timeline
- 24-06-2026PublishedVulnerability first disclosed.
- 10-08-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
7 scores · 7 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · WolfiEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · GoEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · ChainguardEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.78%
Chance of exploitation in the next 30 days
Percentile
56%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.78% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-306Missing Authentication for Critical FunctionalityThe product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
- CWE-78Improper Neutralization of Special Elements used in an OS CommandThe product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Chainguard4 products
- telegraf-1.36All versions (No fix recorded)
- telegraf-1.37All versions (No fix recorded)
- telegraf-1.38< 1.38.4-r19
- telegraf-1.39< 1.39.2-r3
Wolfi3 products
- telegraf-1.36All versions (No fix recorded)
- telegraf-1.37All versions (No fix recorded)
- telegraf-1.38< 1.38.4-r19
Debian1 product
- rcloneAll versions (No fix recorded)
Github.com/ncw1 product
- rclone≥ 1.46.0 (No fix recorded)
Github.com/rclone1 product
- rclone≥ 1.46.0, < 1.74.3 | ≥ 1.49.0, < 1.74.3
Rclone1 product
- rclone≥ 1.46.0, < 1.74.3 | ≥ 1.46, < 1.74.3
Ubuntu1 product
- rcloneAll versions (No fix recorded) | < 1.53.3-4ubuntu1.22.04.5 | < 1.60.1+dfsg-3ubuntu0.24.04.6 | < 1.60.1+dfsg-4ubuntu3.2
7 vendors · 12 products
References
13 links- github.com/rclone/rclone/security/advisories/GHSA-qw24-gh76-8rvvX Refsource CONFIRMREPORTAdvisoryWEBMitigationVendor Advisory
- access.redhat.com/security/cve/CVE-2026-49980VDB EntryX Refsource REDHATAdvisoryWEBThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2492478Issue TrackingX Refsource REDHATREPORTWEBThird Party Advisory
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49980.jsonX Sadp Csaf VexWEBThird Party Advisory
