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CVE-2026-40460

NGINX ngx_quic_module vulnerability

MEDIUM

6.5

CVSS Score

Published: May 13, 2026 at 02:12 PM UTC

Updated: June 29, 2026 at 03:23 PM UTC

7 products affected across 1 vendorNGINX PlusNGINX Open SourceNGINX Ingress Controller

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

95%

4.3.0 ≤ v ≤ 4.7.04.8.0

NGINX Gateway Fabric · F5

95%

1.3.0 ≤ v ≤ 1.6.22.0.0 ≤ v ≤ 2.6.0

NGINX Ingress Controller · F5

95%

3.5.0 ≤ v ≤ 3.7.24.0.0 ≤ v ≤ 4.0.15.0.0 ≤ v ≤ 5.4.2

NGINX Instance Manager · F5

95%

2.16.0 ≤ v ≤ 2.22.0

NGINX Open Source · F5

95%

1.25.0 ≤ v ≤ 1.30.01.26.0 ≤ v < 1.30.11.26.0

Affected range stops below 1.30.1, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 1.31.0 (unaffected)

NGINX Plus · F5

95%

R32 ≤ v < R32 P6R36 ≤ v < R36 P4r32 ≤ v ≤ r36R32R36

Affected range stops below R32 P6, so it looks safe — our inference, not a vendor statement

Affected range stops below R36 P4, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in R37 (unaffected)

95%

4.9.0 ≤ v ≤ 4.16.05.1.0 ≤ v ≤ 5.8.05.9.0 ≤ v ≤ 5.12.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://my.f5.com/manage/s/article/K000161068

References (1)

Vendor AdvisoryPatch

Source: cverecord

https://my.f5.com/manage/s/article/K000161068

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMf5

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: LOW

Vector?

Quick Info

StatusANALYZED

CWE

CWE-290

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