Vulnerability · CVE-2026-97205

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module.

Published Oct 14, 2026 · catalog updated Oct 18, 2026 · F5 NGINX Plus

Check if you run it

No confirmed exploitation is on record for CVE-2026-97205. EPSS is 0.44%. Act only if a listed version of F5 NGINX Plus is installed.

Gaps on this record

No vendor fix or required action is stored. Compare the linked advisory before you change production.

Severity: Critical9.2
Known exploitation: Not in CISA/VulnCheck KEV
EPSS: 0.44%
Remediation: Advisory link
Affected products: Debian:12 nginx · Debian:13 nginx · Debian:14 nginx · vendor F5 NGINX Open Source · vendor F5 NGINX Plus

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

Debian:12 nginx1.22.1-9, 1.22.1-9+deb12u1, 1.22.1-9+deb12u10
Debian:13 nginx1.26.3-3, 1.26.3-3+deb13u1, 1.26.3-3+deb13u2
Debian:14 nginx0 → 1.30.4-8
vendor F5 NGINX Open Sourceversion unspecified
vendor F5 NGINX Plusversion unspecified

How to fix CVE-2026-97205

Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-97205. EPSS is 0.44%. Act only if a listed version of F5 NGINX Plus is installed.

Which versions are affected?

Compare what you have installed with 1.22.1-9, 1.22.1-9+deb12u1, 1.22.1-9+deb12u10, 1.26.3-3, 1.26.3-3+deb13u1, 1.26.3-3+deb13u2, 0 → 1.30.4-8. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-416: Use After Free. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security Nginx security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

Oct 14, 2026 · NIST NVD
Detected
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 exec
Oct 14, 2026 · NIST NVD
Updated
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 exec
Oct 15, 2026 · NIST NVD
Updated
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 exec
Oct 15, 2026 · NIST NVD
Updated
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 exec
Oct 18, 2026 · Trivy Vulnerability DB
Fix available
nginx fixed in 1.30.4-8
Oct 18, 2026 · Trivy Vulnerability DB
Fix available
nginx fixed in 1.30.4-8
Oct 18, 2026 · Trivy Vulnerability DB
Updated
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 exec

Sources

CIRCL Vulnerability LookupVulnerability recordCVE-2026-97205
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) i
vulnerability.circl.lu
CVE.orgVulnerability recordCVE-2026-97205
Official CVE identifier
cve.org
FIRST EPSSExploitation probabilityCVE-2026-97205
30-day exploitation probability 0.4%
first.org
NIST NVDVulnerability recordCVE-2026-97205
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) i
nvd.nist.gov
OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-97205
osv.dev
Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-97205
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) i
osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

Priority score

30/100

Evidence confidence: High

Several independent sources name this vulnerability.

Confirmed exploitation0/30
EPSS probability1/20
CVSS severity14/15
Public exploit0/10
Internet exposure10/10
Product prevalence5/5
Threat research0/5

Decision signals

Four separate signals — do not infer one from another.

Critical

CVSS severity
9.2 v4.0
Technical impact. Separate from exploitation likelihood.
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:
EPSS probability
0.44% · p36.91%
Estimated probability of exploitation within 30 days (FIRST).
Known exploitation
No verified KEV listing
Evidence from CISA KEV or VulnCheck KEV only — not from EPSS alone.
Patch availability
Advisory link
A patch or advisory reference is linked. Open the original publisher for availability by product version.

Stacks

Debian Debian 12 Debian 13 Debian 14 F5 Linux nginx

Weakness

CWE-416
Use After Free
MITRE definition

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