CVE-2026-3415XML External Entity (XXE) Injection via Schema Validation in Multiple WSO2 Products Allows File Reading and Denial of Service
- 8.7HighCVSS base score
- 0.49%Exploitation in 30 daysEPSS · top 58% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The XML and schema validation functionalities within the SchemaValidator Mediator process XML input as part of validation flows. Under certain conditions, the XML parser allows the resolution of external entities when handling user-supplied XML content during validation operations. This behavior can occur when an attacker supplies crafted XML payloads to the relevant mediator flows with sufficient privileges. Successful exploitation may allow a highly privileged actor to read files accessible within the server hosting the affected product. Additionally, it may be possible to trigger outbound requests to unintended internal or external locations, depending on the server environment and network configuration. Specially crafted XML payloads can also lead to excessive resource consumption during parsing, impacting the availability of the product.
Timeline
ID reserved
By WSO2
- 5 months later
· 5 months later
Published
- 3 months later
· 3 months 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 | High8.7 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H |
| NVDNVD · Deferred | 3.1 | High8.7 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.49% · top 58% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Affected products
- unknown < 3.2.0
- affected 3.2.0 – < 3.2.0.472
- affected 3.2.1 – < 3.2.1.91
- affected 4.1.0 – < 4.1.0.254
- affected 4.2.0 – < 4.2.0.194
- affected 4.3.0 – < 4.3.0.105
- affected 4.4.0 – < 4.4.0.68
- affected 4.5.0 – < 4.5.0.53
- affected 4.6.0 – < 4.6.0.16
- affected 4.5.0 – < 4.5.0.53
- affected 4.6.0 – < 4.6.0.16
- affected 4.5.0 – < 4.5.0.52
- affected 4.6.0 – < 4.6.0.16
- affected 4.5.0 – < 4.5.0.54
- affected 4.6.0 – < 4.6.0.17
WSO2 · WSO2 Carbon API Gateway
- affected 6.7.206 – < 6.7.206.594
- affected 6.7.210 – < 6.7.210.95
- affected 9.20.74 – < 9.20.74.398
- affected 9.28.116 – < 9.28.116.412
- affected 9.29.120 – < 9.29.120.228
- affected 9.30.67 – < 9.30.67.158
- affected 9.31.86 – < 9.31.86.147
- affected 9.32.147 – < 9.32.147.38
- unaffected 9.33.61 – ≤ *
WSO2 · WSO2 Carbon API Management Implementation
- affected 6.7.206 – < 6.7.206.594
- affected 6.7.210 – < 6.7.210.95
- affected 9.20.74 – < 9.20.74.398
- affected 9.28.116 – < 9.28.116.412
- affected 9.29.120 – < 9.29.120.228
- affected 9.30.67 – < 9.30.67.158
- affected 9.31.86 – < 9.31.86.147
- affected 9.32.147 – < 9.32.147.38
- unaffected 9.33.61 – ≤ *
What to do
Solution: Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5001/#solution https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5001/#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-2026-54208 (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-2026-3415)Record last updated .