CVE-2026-90439

mediumpriority · track · 26EPSS 0.003 · 16 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (16th) EPSS

CVSS 6.5 · medium

Is it mine?

10 products

Check your exposure

Who says so?

2 sources

osv · cert_bund

EPSS · scored 2026-10-22

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with OpenSSL versions <= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control. This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

cvss

Technical severity, 0–10. One row per scoring source.

6.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.7–6.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Lprimary · f5sirt@f5.comexploitability 3.9 · impact 2.5

v4.06.9mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · f5sirt@f5.com

v4.02.7lowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-122US

affected products (10)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Nginx Nginx≤ Open Source <1.31.6cert_bundDE
Nginx Nginx≤ Open Source <1.30.5cert_bundDE
Bitnami nginx1.29.2 → 1.30.0osvUSpkg:bitnami/nginx
Bitnami nginx1.30.4 → 1.30.5osvUSpkg:bitnami/nginx
Bitnami nginx1.31.0 → 1.31.6osvUSpkg:bitnami/nginx
Bitnami nginx-gateway1.29.2 → 1.30.0osvUSpkg:bitnami/nginx-gateway
Bitnami nginx-gateway1.30.4 → 1.30.5osvUSpkg:bitnami/nginx-gateway
Bitnami nginx-gateway1.31.0 → 1.31.6osvUSpkg:bitnami/nginx-gateway

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3373NGINX: Schwachstelle ermöglicht Denial of ServiceDeutsch2026-09-15csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in NGINX ausnutzen, um einen Denial of Service Angriff durchzuführen.
BIT-nginx-2026-90439NGINX ngx_http_v3_module vulnerability2026-09-25vendor · osvUS
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with OpenSSL versions <= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control. This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
BIT-nginx-gateway-2026-90439NGINX ngx_http_v3_module vulnerability2026-09-25vendor · osvUS
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with OpenSSL versions <= OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner that is beyond the attacker's control. This may cause a heap buffer overflow in the NGINX worker process leading to a restart and/or limited data corruption. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or limited data corruption. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

also known as (2)

Other names and identifiers for this entity.

BIT-nginx-2026-90439osv
BIT-nginx-gateway-2026-90439osv

sources

Which sources assert this record, and when.

osv cert_bund NVD CVE.org MITRE

published 2026-09-15modified 2026-09-18

references (1) nvd

External citations — patches, advisories, analysis.

https://my.f5.com/manage/s/article/K000162604

scry

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