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ExploitedNot in CISA KEV yetFix available

CVE-2026-41176

Exploitation confirmed. First attested on 2026-05-13 by GCVE · kevintel, GCVE · shadowserver.

  • Published2026-04-23
  • Fixed in1.73.5
  • WeaknessCWE-15 · CWE-306

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Rclone is a command-line program to sync files and directories to and from different cloud storage providers. The RC endpoint `options/set` is exposed without `AuthRequired: true`, but it can mutate global runtime configuration, including the RC option block itself. Starting in version 1.45.0 and prior to version 1.73.5, an unauthenticated attacker can set `rc.NoAuth=true`, which disables the authorization gate for many RC methods registered with `AuthRequired: true` on reachable RC servers that are started without global HTTP authentication. This can lead to unauthorized access to sensitive administrative functionality, including configuration and operational RC methods. Version 1.73.5 patches the issue.

Timeline

dates in UTC
  1. 2026-04-2300:16CVE publishedNVD
  2. 2026-05-1313:00Listed as exploited by GCVEGCVE
  3. 2026-05-1313:00Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-41176?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-41176?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Rclone
BranchAffectedFixed in
1.x≥ 1.45, < 1.73.51.73.5
1.73< 1.73.51.73.5
1.x≥ 1.45.0, < 1.73.51.73.5

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Rclone to 1.73.5

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • GCVEexploitation2026-05-13
  • CISA-ADPSSVC decisionpoc2026-04-24
  • OpenCVESSVC decisionpoc—
  • CNACVSS 4.09.2read 2026-10-23
  • CNACVSS 3.19.8read 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • CNAweakness (CWE)CWE-15, CWE-306read 2026-10-23
  • FIRST EPSSEPSS score3.2 %2026-10-22
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-04-23
Last Modified
2026-07-15
NVD status
Modified

Frequently asked questions

What is CVE-2026-41176?

Rclone is a command-line program to sync files and directories to and from different cloud storage providers. The RC endpoint `options/set` is exposed without `AuthRequired: true`, but it can mutate global runtime configuration, including the RC option block itself. Starting in version 1.45.0 and prior to version 1.73.5, an unauthenticated attacker can set `rc.NoAuth=true`, which disables the authorization gate for many RC methods registered with `AuthRequired: true` on reachable RC servers that are started without global HTTP authentication. This can lead to unauthorized access to sensitive administrative functionality, including configuration and operational RC methods. Version 1.73.5 patches the issue.

Is CVE-2026-41176 actively exploited?

A proof-of-concept exploit exists for CVE-2026-41176, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-41176?

CVE-2026-41176 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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