Retrospective for 2026-07-02, compiled on 27 October 2026. The date identifies the day being analysed; source publication and revision dates are recorded below.
What this advisory changes in your environment
The starting point is CERTFR-2026-AVI-0826, published on 2026-07-02. Its scope includes Kibana, Fleet Server, Elastic Defend, Elasticsearch. Reported consequences are denial of service, data integrity compromise, security control bypass, loss of confidentiality. These statements apply to the advisory’s scope; they do not assign every consequence to every product or CVE.
This case contains 15 version entries; CVE identifier count: 11. Track remediation by component: a successful overall update does not demonstrate that Kibana and Elasticsearch each received their respective fix.
Products and versions to examine
- Reference
- CERTFR-2026-AVI-0826
- Source first published
- 2026-07-02
- Latest source revision available for this day
- 2026-07-02
- Named components
- Kibana, Fleet Server, Elastic Defend, Elasticsearch
- CVE identifiers
- CVE-2026-49091, CVE-2026-56150, CVE-2026-56151, CVE-2026-49090, CVE-2026-32283, CVE-2026-56149, CVE-2026-56152, CVE-2026-56148, CVE-2026-49089, CVE-2026-49088, CVE-2026-49087
| Component | Published condition |
|---|---|
| Kibana | 8.17.x : < 8.17.2 |
| Kibana | 8.19.x : < 8.19.17 |
| Fleet Server | 8.x : < 8.19.15 |
| Elastic Defend | 9.3.x : < 9.3.2 |
| Kibana | 8.18.x : < 8.18.9 |
| Elasticsearch | 9.4.x : < 9.4.3 |
| Kibana | 8.x : < 8.16.3 |
| Elastic Defend | 9.x : < 9.2.7 |
| Elasticsearch | 8.x : < 8.19.17 |
| Elasticsearch | 9.x : < 9.3.5 |
| Elasticsearch | 7.x : < 7.17.24 |
| Elastic Defend | postérieures à 8.6.x : < 8.19.13 |
| Kibana | 7.x : < 7.17.15 |
| Fleet Server | 9.x : < 9.3.4 |
For Kibana, the published condition is “8.17.x : < 8.17.2”. Compare the version actually loaded with that condition within its own release branch. A fix installed on another edition of Kibana, Fleet Server does not close this case.
Mechanism and prerequisites
A security bypass challenges a trust boundary. Verify server-side authorisation decisions and alternative paths; hiding an interface is not an access restriction.
The primary record CVE-2026-49091, published by elastic, covers Kibana. The retained revision is dated 2026-07-02. Its scope is presented separately from the integrations and product groupings in CERTFR-2026-AVI-0826.
The published metric for CVE-2026-49091 is CVSS 3.1, 8/10. The vector below describes technical prerequisites; it does not measure attack frequency or the likelihood that your deployment is compromised.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
- Attack vector
- network
- Prior privileges
- low
- User interaction
- required
- Complexity
- high
- Weakness
- CWE-116
Choose the appropriate intervention
- Locate Kibana instances, running releases and service owners. Record condition 8.17.x : < 8.17.2 in the ticket alongside reference CERTFR-2026-AVI-0826.
- Compare the installed branch with the vendor’s Kibana release notes. Prepare the package for that branch and a dependent-service test, retaining the pre-change state.
- After changing Kibana, capture the loaded version again and verify the workflow below. Any exception needs an owner, an exposure-reduction measure and an expiry date.
Verify the fix in a real workflow
Validation scenario to adapt for Kibana, Fleet Server: For Kibana, capture the version loaded by the process or active kernel, then restart only as required by maintenance instructions. Check a dependent workflow and look for embedded copies in distributed images or executables. This is a proposed defensive check, not a claim that testing was performed against third-party systems.
Limit of case CERTFR-2026-AVI-0826: this analysis replaces neither vendor prerequisites nor investigation of your logs. Only documented versions are reproduced; no attack date or victim is invented.
Questions specific to this case
Which condition should be checked for Kibana?
Advisory CERTFR-2026-AVI-0826 states: Kibana — 8.17.x : < 8.17.2. Check the edition and running release; do not extend the published boundary to branches absent from the advisory.
Why not use one fix for Kibana and Elasticsearch?
CERTFR-2026-AVI-0826 distinguishes these components within a scope containing 15 entries. Match each branch to its own update documentation and functional check.
Which prerequisites does record CVE-2026-49091 specify?
For CVE-2026-49091, the published vector is CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H. Verify those conditions on Kibana before applying them to an integration named in CERTFR-2026-AVI-0826.
Sources and related reading
- CERT-FR · CERTFR-2026-AVI-0826
- Vendor and remediation · discuss.elastic.co
- Vendor and remediation · discuss.elastic.co
- Vendor and remediation · discuss.elastic.co
- Vendor and remediation · discuss.elastic.co
- CVE-2026-49091 · CNA
Practical guide : Prioritize vulnerabilities and verify remediation
Explore the decision addressed in this case
Complete source advisory inventory
The article table may be an extract. These lists contain every affected-system entry and CVE in the specified advisory revision. They are not an inventory of your assets and do not map every CVE to every product.
Official source · CERTFR-2026-AVI-0826
Advisory revision : · Checked on :
Affected systems · 15
Original French wording is retained to avoid ambiguous translations of version conditions.
- Kibana versions 8.17.x antérieures à 8.17.2
- Kibana versions 8.19.x antérieures à 8.19.17
- Fleet Server versions 8.x antérieures à 8.19.15
- Elastic Defend versions 9.3.x antérieures à 9.3.2
- Kibana versions 8.18.x antérieures à 8.18.9
- Elasticsearch versions 9.4.x antérieures à 9.4.3
- Kibana versions 8.x antérieures à 8.16.3
- Elastic Defend versions 9.x antérieures à 9.2.7
- Elasticsearch versions 8.x antérieures à 8.19.17
- Elasticsearch versions 9.x antérieures à 9.3.5
- Elasticsearch versions 7.x antérieures à 7.17.24
- Elastic Defend versions postérieures à 8.6.x antérieures à 8.19.13
- Kibana versions 7.x antérieures à 7.17.15
- Kibana versions 9.x antérieures à 9.0.8, 9.1.6, 9.3.6 ou 9.4.3
- Fleet Server versions 9.x antérieures à 9.3.4