CVE-2026-21866
- Source
- https://cve.org/CVERecord?id=CVE-2026-21866
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21866.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-21866
- Aliases
-
- GHSA-qpv6-75c2-75h4
- Published
- 2026-03-03T21:42:25.311Z
- Modified
- 2026-04-10T05:38:34.621748Z
- Severity
-
- 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator
- Summary
- Dify - Stored XSS in chat
- Details
-
Dify is an open-source LLM app development platform. Prior to 1.11.2, Dify is vulnerable to a stored XSS issue when rendering Mermaid diagrams within chats. This occurs because Dify’s default Mermaid configuration uses securityLevel: loose, which allows potentially unsafe content to execute. This vulnerability is fixed in 1.11.2.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-79" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21866.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21866.json
- https://github.com/langgenius/dify/security/advisories/GHSA-qpv6-75c2-75h4
- https://nvd.nist.gov/vuln/detail/CVE-2026-21866
- https://github.com/langgenius/dify/commit/ae17537470bba417a8971fff705dd82ecb043564
- https://github.com/langgenius/dify/pull/29811
Affected packages
Git / github.com/langgenius/dify
Affected ranges
- Type
- GIT
- Repo
- https://github.com/langgenius/dify
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
0.*
0.10.0
0.10.1
0.10.2
0.11.0
0.11.1
0.11.2
0.12.0
0.12.1
0.13.0
0.13.1
0.13.2
0.14.0
0.14.1
0.14.2
0.15.0
0.15.1
0.15.2
0.15.3
0.2.1
0.2.2
0.3.0
0.3.1
0.3.10
0.3.11
0.3.12
0.3.13
0.3.14
0.3.15
0.3.16
0.3.17
0.3.18
0.3.19
0.3.2
0.3.20
0.3.21
0.3.22
0.3.23
0.3.24
0.3.25
0.3.26
0.3.27
0.3.28
0.3.29
0.3.3
0.3.30
0.3.31
0.3.31-fix1
0.3.31-fix2
0.3.31-fix3
0.3.32
0.3.33
0.3.34
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.3.9
0.4.0
0.4.1
0.4.2
0.4.3
0.4.4
0.4.5
0.4.6
0.4.7
0.4.8
0.4.9
0.5.0
0.5.1
0.5.10
0.5.11
0.5.11-fix1
0.5.2
0.5.3
0.5.4
0.5.5
0.5.6
0.5.7
0.5.8
0.5.9
0.6.0
0.6.0-fix1
0.6.1
0.6.10
0.6.11
0.6.12
0.6.12-fix1
0.6.13
0.6.14
0.6.15
0.6.16
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6
0.6.7
0.6.8
0.6.9
0.7.0
0.7.1
0.7.2
0.7.3
0.8.0
0.8.1
0.8.2
0.8.3
0.9.0
0.9.1
0.9.2
1.*
1.0.0
1.0.1
1.1.0
1.1.1
1.1.2
1.1.3
1.10.0
1.10.1
1.11.0
1.11.1
1.2.0
1.3.0
1.3.1
1.4.0
1.4.1
1.4.2
1.4.3
1.5.0
1.5.1
1.6.0
1.7.0
1.7.1
1.7.2
1.8.0
1.8.1
1.9.0
1.9.1