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Back to active CVEs
Medium · CVSS 6.9CVE-2026-116193

Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS RequestsCVE-2026-116193

Answer in brief

CVE-2026-116193 records a Medium severity (CVSS 6.9) vulnerability in Rclone 1.64.0 before 1.75.2 serve webdav Authentication Bypass via OPTIONS Requests. The current sources do not mark it as known exploited. The current feed maps rclone/rclone (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 25, 2026Updated Oct 25, 2026Source checked Oct 25, 2026First seen by HOL Oct 25, 2026Material review Oct 25, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rclone/rclone (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
rclone/rclonegeneric>=1.64.0 <1.75.21.75.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for rclone/rclone.
  2. 2Review the reported fix. Update rclone/rclone to 1.75.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 25, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets unauthenticated attackers skip authentication by sending OPTIONS requests. Attackers can probe arbitrary paths and compare Allow header values to determine whether files or collections exist, enabling namespace enumeration.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart UploadsSame rclone/rclone package
  • rclone serve s3 1.75.0 before 1.75.2 Memory Limit Bypass via Multipart OverflowSame rclone/rclone package
  • rclone 1.55.0 before 1.75.2 selfupdate Signature Verification Bypass via SHA256SUMSSame rclone/rclone package
  • rclone v1.56.0 before v1.75.2 WebDAV Credential Header Leak on RedirectSame rclone/rclone package
  • Rclone before 1.75.2 Path Traversal via serve webdav MKCOLSame rclone/rclone package
  • rclone from 1.37 before 1.74.2 SSRF via --rc-serve scheme-relative remote rootsSame rclone/rclone package

Record context

Vulnerability class
Arbitrary File Read
EPSS
Not reported
CWE IDs
CWE-200
Source
CVE List V5
Source checked
Oct 25, 2026
References
2 linked sources
Open source record