CVE-2026-3418
Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
- 9.1CriticalCVSS base score
- 0.76%Exploitation in 30 daysEPSS · top 44% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The System REST API accepts user-supplied file uploads without enforcing sufficient validation on the file type or destination, allowing files to be written to arbitrary server-accessible locations. Exploitation requires authenticated administrative access with publisher privileges. Successful exploitation permits an authenticated publisher to upload files to server-accessible locations. Depending on the deployment environment and how uploaded files are handled, this could lead to the execution of uploaded content, potentially resulting in remote code execution.
Timeline
ID reserved
By WSO2
- 5 months later
· 5 months later
Published
- 48 days later
· 48 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WSO2CNA (assigner) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.76% · top 44% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Affected products
- affected 4.4.0 – < 4.4.0.67
- affected 4.5.0 – < 4.5.0.52
- affected 4.6.0 – < 4.6.0.16
- affected 4.5.0 – < 4.5.0.51
- affected 4.6.0 – < 4.6.0.16
- affected 4.5.0 – < 4.5.0.53
- affected 4.6.0 – < 4.6.0.17
- affected 4.5.0 – < 4.5.0.52
- affected 4.6.0 – < 4.6.0.16
WSO2 · WSO2 Carbon API Management Implementation
- affected 9.30.67 – < 9.30.67.156
- affected 9.31.86 – < 9.31.86.141
- affected 9.32.147 – < 9.32.147.44
- unaffected 9.33.104 – ≤ *
WSO2 · WSO2 API Manager Publisher REST API V4
- affected 9.30.67 – < 9.30.67.156
- affected 9.31.86 – < 9.31.86.141
- affected 9.32.147 – < 9.32.147.44
- unaffected 9.33.104 – ≤ *
WSO2 · WSO2 Carbon API Management API
- affected 9.30.67 – < 9.30.67.156
- unaffected 9.33.104 – ≤ *
What to do
Solution: Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/#solution https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/#solution
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-54209 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-3418)Record last updated .