Retrospective for 2026-09-20, 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-1182, published on 2026-09-16. Its scope includes NGINX Open Source, NGINX Plus, NGINX Ingress Controller, NGINX Gateway Fabric. Reported consequences are denial of service, data integrity compromise. These statements apply to the advisory’s scope; they do not assign every consequence to every product or CVE.
This case contains 6 version entries; CVE identifier count: 1. Track remediation by component: a successful overall update does not demonstrate that NGINX Open Source and NGINX Gateway Fabric each received their respective fix.
Products and versions to examine
- Reference
- CERTFR-2026-AVI-1182
- Source first published
- 2026-09-16
- Latest source revision available for this day
- 2026-09-17
- Named components
- NGINX Open Source, NGINX Plus, NGINX Ingress Controller, NGINX Gateway Fabric
- CVE identifiers
- CVE-2026-90439
| Component | Published condition |
|---|---|
| NGINX Open Source | < 1.30.5 |
| NGINX Open Source | 1.31.x : < 1.31.6 |
| NGINX Plus | 37.x : < 37.0.6.2 |
| NGINX Plus | 37.1.x : < 37.1.1.2 |
| NGINX Ingress Controller | < 5.6.3 |
| NGINX Gateway Fabric | 2.x : < 2.7.2 |
For NGINX Open Source, the published condition is “< 1.30.5”. Compare the version actually loaded with that condition within its own release branch. A fix installed on another edition of NGINX Open Source, NGINX Plus does not close this case.
Mechanism and prerequisites
Data modification can undermine decisions made from the system. Compare sensitive objects with a trusted reference and test recovery of a sample; an unverified backup is not proof of integrity.
The primary record CVE-2026-90439, published by f5, covers NGINX Plus, NGINX Open Source. The retained revision is dated 2026-09-16. Its scope is presented separately from the integrations and product groupings in CERTFR-2026-AVI-1182.
The published metric for CVE-2026-90439 is CVSS 4.0, 6.9/10. The vector below describes technical prerequisites; it does not measure attack frequency or the likelihood that your deployment is compromised.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- Attack vector
- network
- Prior privileges
- none
- User interaction
- none
- Complexity
- low
- Additional attack requirements
- none
- Weakness
- CWE-122
Choose the appropriate intervention
- Locate NGINX Open Source instances, running releases and service owners. Record condition < 1.30.5 in the ticket alongside reference CERTFR-2026-AVI-1182.
- Compare the installed branch with the vendor’s NGINX Open Source release notes. Prepare the package for that branch and a dependent-service test, retaining the pre-change state.
- After changing NGINX Open Source, 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 NGINX Open Source, NGINX Plus: For NGINX Open Source, test an authorised business flow from each zone reaching the service and confirm management restrictions. If a redundant pair exists, verify both nodes and rule persistence after failover during a planned maintenance window. This is a proposed defensive check, not a claim that testing was performed against third-party systems.
Limit of case CERTFR-2026-AVI-1182: 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 NGINX Open Source?
Advisory CERTFR-2026-AVI-1182 states: NGINX Open Source — < 1.30.5. Check the edition and running release; do not extend the published boundary to branches absent from the advisory.
Why not use one fix for NGINX Open Source and NGINX Gateway Fabric?
CERTFR-2026-AVI-1182 distinguishes these components within a scope containing 6 entries. Match each branch to its own update documentation and functional check.
Which prerequisites does record CVE-2026-90439 specify?
For CVE-2026-90439, the published vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N. Verify those conditions on NGINX Plus, NGINX Open Source before applying them to an integration named in CERTFR-2026-AVI-1182.
Sources and related reading
Practical guide : Software inventory: prepare for end of support
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-1182
Advisory revision : · Checked on :
Affected systems · 6
Original French wording is retained to avoid ambiguous translations of version conditions.
- NGINX Open Source versions antérieures à 1.30.5
- NGINX Open Source versions 1.31.x antérieures à 1.31.6
- NGINX Plus versions 37.x antérieures à 37.0.6.2
- NGINX Plus versions 37.1.x antérieures à 37.1.1.2
- NGINX Ingress Controller versions antérieures à 5.6.3
- NGINX Gateway Fabric versions 2.x antérieures à 2.7.2