CVE-2026-26938 json
Improper Neutralization of Special Elements Used in a Template Engine in Kibana Workflows Leading to Server-Side Request Forgery (SSRF)
published 2026-02-26 8 mo ago modified 2026-09-08 2 mo ago also BIT-elk-2026-26938 , BIT-kibana-2026-26938 , EUVD-2026-8873
- cvss
- 8.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336) exists in Workflows in Kibana which could allow an attacker to read arbitrary files from the Kibana server filesystem, and perform Server-Side Request Forgery (SSRF) via Code Injection (CAPEC-242). This requires an authenticated user who has the workflowsManagement:executeWorkflow privilege.
Patch / fix
- bitnami elk 9.3.1
- bitnami kibana 9.3.1
- elastic kibana 9.3.1
- elasticsearch kibana 9.3.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
| NVD | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| OSV | 3.1 | 7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | elk | >=9.3.0, <9.3.1 |
9.3.1 |
| bitnami | kibana | >=9.3.0, <9.3.1 |
9.3.1 |
Affected products
- Elastic Kibana
Classification
- Weakness
-
- CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
References
-
discuss.elastic.co
/t/kibana-9-3-1-security-update-esa-2026-17/385253
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-26938
web
Sources
- CVE List CVE-2026-26938
- NVD CVE-2026-26938
- OSV BIT-elk-2026-26938
- OSV BIT-kibana-2026-26938
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.