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Fencer Intel
high 8.1

CVE-2026-97205 json

NGINX ngx_http_core_module vulnerability

published 26d ago modified 19d ago also BIT-nginx-2026-97205 , BIT-nginx-gateway-2026-97205 , EUVD-2026-101115

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module. When asynchronous file I/O (AIO) is enabled in certain configurations, processing a Server Side Includes (SSI) page containing “include virtual” commands may trigger a Use-After-Free (UAF) in the NGINX worker process. This may cause memory corruption or a worker process crash. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.

Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system, corrupt its memory, or possibly trigger code execution. 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 1.30.6, 1.31.7
  • bitnami nginx-gateway 1.30.6, 1.31.7
  • F5 NGINX Plus 37.0.5.1, 37.1.0.1
  • F5 NGINX Open Source 1.30.6, 1.31.7
  • nginx Debian 13 1.26.3-3+deb13u10
  • nginx Debian 14 1.30.4-8

debian advisories DEBIAN-CVE-2026-97205

  • nginx Ubuntu 22.04 LTS 1.18.0-6ubuntu14.22
  • nginx Ubuntu 24.04 LTS 1.24.0-2ubuntu7.19
  • nginx Ubuntu 26.10 1.30.4-7ubuntu1.1
  • nginx Ubuntu 26.04 LTS 1.28.3-2ubuntu1.12
  • nginx Ubuntu Pro 14.04 LTS 1.4.6-1ubuntu3.9+esm9
  • nginx Ubuntu Pro 16.04 LTS 1.10.3-0ubuntu0.16.04.5+esm10
  • nginx Ubuntu Pro 18.04 LTS 1.14.0-0ubuntu1.11+esm5
  • nginx Ubuntu Pro 20.04 LTS 1.18.0-0ubuntu1.7+esm4

ubuntu advisories UBUNTU-CVE-2026-97205

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nginx hummingbird 1 1.30.6-1.hum1
  • nginx-core hummingbird 1 1.30.6-1.hum1
  • nginx-mod-mail hummingbird 1 1.30.6-1.hum1
  • nginx-filesystem hummingbird 1 1.30.6-1.hum1
  • nginx-mod-stream hummingbird 1 1.30.6-1.hum1
  • nginx-all-modules hummingbird 1 1.30.6-1.hum1
  • nginx-mod-http-perl hummingbird 1 1.30.6-1.hum1
  • nginx-mod-http-geoip hummingbird 1 1.30.6-1.hum1

red hat advisories RHSA-2026:83427

  • nginx openSUSE Tumbleweed 1.31.7-1.1

opensuse advisories openSUSE-SU-2026:12143-1

  • nginx Alpine 3.24 1.30.6-r0

alpine advisories ALPINE-CVE-2026-97205

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

  • nginx Azure Linux 3.0 1.30.6-1

azure linux advisories AZL-108443

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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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-2026-97205 updated cvss 8.1

nginx: NGINX ngx_http_core_module vulnerability

  • Red Hat Enterprise Linux 8 nginx, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, nginx-mod-http-perl, +2 more Red Hat Enterprise Linux 9 nginx, nginx-core, nginx-mod-mail, nginx-filesystem, nginx-mod-stream, nginx-all-modules, +3 more Red Hat Enterprise Linux 10 nginx
    affected: workaround, no fix available “To mitigate this vulnerability, based on your environment requirements, you can either disable asynchronous file I/O (AIO) or Server Side Includes (SSI).”
  • Red Hat Hardened Images nginx 1.30.6-1.hum1, nginx-core 1.30.6-1.hum1, nginx-mod-mail 1.30.6-1.hum1, nginx-filesystem 1.30.6-1.hum1, nginx-mod-stream 1.30.6-1.hum1, nginx-all-modules 1.30.6-1.hum1, +5 more
    fixed: vendor fix “To mitigate this vulnerability, based on your environment requirements, you can either disable asynchronous file I/O (AIO) or Server Side Includes (SSI).” RHSA-2026:83427

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
no
Technical impact
total
Assessed
25d ago

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 9.2 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 9.2 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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
>=1.30.0, <1.30.6
>=1.31.0, <1.31.7
1.30.6
1.31.7
bitnami nginx-gateway
>=1.30.0, <1.30.6
>=1.31.0, <1.31.7
1.30.6
1.31.7

Affected products

  • F5 NGINX Plus
  • F5 NGINX Open Source

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel 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.