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Fencer Vulns
high 7.7

CVE-2026-42398 json

Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access

published 2026-05-28 5 mo ago modified 2026-10-14 25 d 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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

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

Sources

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.