Skip to content
Fencer Vulns
medium 6.5

CVE-2026-90439 json

NGINX ngx_http_v3_module vulnerability

published 2026-09-15 54 d ago modified 2026-09-26 43 d ago also BIT-nginx-2026-90439 , BIT-nginx-gateway-2026-90439 , EUVD-2026-78585

cvss
6.5
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 17%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami nginx 1.30.0, 1.30.5, 1.31.6
  • bitnami nginx-gateway 1.30.0, 1.30.5, 1.31.6
  • F5 NGINX Plus 37.0.6.2, 37.1.1.2
  • F5 NGINX Open Source 1.30.5, 1.31.6
  • nginx Debian 14 1.30.4-7

debian advisories DEBIAN-CVE-2026-90439

  • nginx hummingbird 1 1.30.5-4.hum1
  • nginx-core hummingbird 1 1.30.5-4.hum1
  • nginx-mod-mail hummingbird 1 1.30.5-4.hum1
  • nginx-filesystem hummingbird 1 1.30.5-4.hum1
  • nginx-mod-stream hummingbird 1 1.30.5-4.hum1
  • nginx-all-modules hummingbird 1 1.30.5-4.hum1
  • nginx-mod-http-perl hummingbird 1 1.30.5-4.hum1
  • nginx-mod-http-geoip hummingbird 1 1.30.5-4.hum1

red hat advisories RHSA-2026:67977

  • nginx openSUSE Tumbleweed 1.31.6-1.1

opensuse advisories openSUSE-SU-2026:11807-1

  • nginx Alpine 3.24 1.30.6-r0

alpine advisories ALPINE-CVE-2026-90439

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-90439 updated cvss 6.5

nginx: NGINX ngx_http_v3_module: Denial of Service via TLS handshake heap buffer overflow

  • Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: no fix available “Fix deferred”
  • Red Hat Hardened Images nginx 1.30.5-4.hum1, nginx-core 1.30.5-4.hum1, nginx-mod-mail 1.30.5-4.hum1, nginx-filesystem 1.30.5-4.hum1, nginx-mod-stream 1.30.5-4.hum1, nginx-all-modules 1.30.5-4.hum1, +5 more
    fixed: vendor fix RHSA-2026:67977
  • Red Hat Hardened Images php
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
54 d ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CNA 4.0 6.9 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
CNA 4.0 6.9 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/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:X

Affected packages

ecosystem package affected fixed in
bitnami nginx
>=1.29.2, <1.30.0
>=1.30.4, <1.30.5
>=1.31.0, <1.31.6
1.30.0
1.30.5
1.31.6
bitnami nginx-gateway
>=1.29.2, <1.30.0
>=1.30.4, <1.30.5
>=1.31.0, <1.31.6
1.30.0
1.30.5
1.31.6

Affected products

  • F5 NGINX Plus
  • F5 NGINX Open Source

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow
Technology feeds

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.