CVE-2026-54563: cloudreve Incorrect Authorization
Vulnerability summary
CVE-2026-54563 is a high (CVSS 7.1) Incorrect Authorization vulnerability in cloudreve. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.1% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 15-07-2026PublishedVulnerability first disclosed.
- 15-07-2026Last modifiedVulnerability information updated.
Description
Cloudreve is a self-hosted file management and sharing system. Prior to 4.16.1, a Cloudreve WebDAV account rooted at a configured folder can send paths such as /dav/%2e%2e/outside.txt because stripPrefix in pkg/webdav/webdav.go joins the decoded request suffix to the account root with fs.URI.JoinRaw without checking containment, allowing the scoped credential to read and list files outside the configured folder and writable credentials to create, overwrite, move, or delete them. This issue is reported as fixed in version 4.16.1.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · GoEcosystem advisory · calculated7.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
- NVDNIST7.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
EPSS trend
Probability
0.32%
Chance of exploitation in the next 30 days
Percentile
23%
Versus all other CVEs
30-day change
0.00 pp
From 0.32% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Github.com/cloudreve/Cloudreve2 products
- v3≤ 3.0.0-20250225100611-da4e44b77af4 | All versions (No fix recorded)
- v4< 4.0.0-20260606032813-26b6b1044b02
Cloudreve1 product
- cloudreve< 4.16.1
Github.com/cloudreve1 product
- CloudreveAll versions (No fix recorded)
3 vendors · 4 products
References
4 links- github.com/cloudreve/cloudreve/security/advisories/GHSA-w5fv-7x5q-g8qpX Refsource CONFIRMWEBAdvisory
