CVE-2026-42398 json
Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access
published 5mo ago modified 26d ago also BIT-elk-2026-42398 , BIT-kibana-2026-42398 , EUVD-2026-33032
- cvss
- 7.7
- 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 22%
- public exploits
- 0
- none known
Summary
Server-Side Request Forgery (CWE-918) in Kibana allows authenticated users with connector management privileges to bypass the operator-configured connection allowlist. By configuring a Webhook connector with a crafted target, an attacker can cause Kibana to issue outbound requests to destinations that the egress restriction controls were intended to block.
Patch / fix
- bitnami elk 9.2.8, 9.3.2
- bitnami kibana 9.2.8, 9.3.2
- elastic kibana 9.2.8, 9.3.2
- elasticsearch kibana 9.2.8, 9.3.2
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 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 | >=9.0.0, <9.2.8 >=9.3.0, <9.3.2 |
9.2.8 9.3.2 |
| bitnami | kibana | >=9.0.0, <9.2.8 >=9.3.0, <9.3.2 |
9.2.8 9.3.2 |
Affected products
- Elastic Kibana
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
discuss.elastic.co
/t/kibana-9-2-8-and-9-3-2-security-update-esa-2026-37/386557
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-42398
web
Sources
- CVE List CVE-2026-42398
- NVD CVE-2026-42398
- OSV BIT-elk-2026-42398
- OSV BIT-kibana-2026-42398
Fencer Intel 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.