Skip to content
Noroxi
CVE-2026-101048· NVD / CVE Program· CNA VulnCheck

Cloudreve before 4.17.0 SSRF via Admin.Read OAuth scope

Cloudreve before 4.17.0 registers the administrative node test endpoints (POST /api/v4/admin/node/test and POST /api/v4/admin/node/test/downloader) without requiring the Admin.Write OAuth scope, unlike the node create/update/delete routes. An OAuth client that has been authorized by an administrator with only the Admin.Read scope can therefore submit attacker-controlled node definitions and cause the Cloudreve server to issue outbound requests to arbitrary URLs, enabling blind server-side request forgery, internal service probing, and delivery of signed Cloudreve slave-style requests to attacker-chosen endpoints.

MediumCVSS 5.3 · v4.0—No exploit Fix available
Published
Sep 27, 2026
Updated
Sep 30, 2026
EPSS
0.2% · 7th percentile
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
5.3
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • cloudreve cloudreve

    • 4.17.0not affected
    • before 4.17.0affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Gogithub.com/cloudreve/Cloudreveall versions—
Gogithub.com/cloudreve/Cloudreve/v3up to and including 3.0.0-20250225100611-da4e44b77af4—
Gogithub.com/cloudreve/Cloudreve/v3all versions—
Gogithub.com/cloudreve/Cloudreve/v4before 4.0.0-20260626022735-332a9d8002054.0.0-20260626022735-332a9d800205

Same product

cloudreve: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-25726Cloudreve is vulnerable to Account Takeover via Weak Cryptographic Token Generation (Insecure PRNG Seeding)
    39Monitor
  • CVE-2026-54560Cloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim
    30Monitor
  • CVE-2026-77633Cloudreve: Storage-quota TOCTOU race allows quota bypass and storage-based denial of service
    28Monitor
  • CVE-2026-55502Cloudreve: OAuth Admin.Read scope can update OneDrive storage policy credentials
    28Monitor
  • CVE-2026-54563Cloudreve: Path Traversal / Broken Access Control in Cloudreve WebDAV (`/dav`) — scoped DAV credential escapes its configured account root
    28Monitor
  • CVE-2026-101056Cloudreve before 4.16.1 Authentication Bypass via Cached Context Hint
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
cloudreve cloudreve4.17.0Vendor (CNA)
Go:github.com/cloudreve/Cloudreve/v44.0.0-20260626022735-332a9d800205Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-5456074 days apartCloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim
    30Monitor
  • CVE-2026-5550258 days apartCloudreve: OAuth Admin.Read scope can update OneDrive storage policy credentials
    28Monitor
  • CVE-2026-5456374 days apartCloudreve: Path Traversal / Broken Access Control in Cloudreve WebDAV (`/dav`) — scoped DAV credential escapes its configured account root
    28Monitor
  • CVE-2026-1010560 days apartCloudreve before 4.16.1 Authentication Bypass via Cached Context Hint
    27Monitor
  • CVE-2026-6232358 days apartCloudreve: Unauthorized file write via WOPI view sessions whose access token secret is ignored
    25Monitor
  • CVE-2026-5549958 days apartCloudreve: Broken access control in file event stream leaks activity events for unshared siblings to single-file share recipients
    17Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-1010560 days apartCloudreve before 4.16.1 Authentication Bypass via Cached Context Hint
    27Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-863 · Incorrect Authorization

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. SSVC exploitation— → poc
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records