CVE-2026-40701

mediumpriority · track · 10EPSS 0.007 · 53 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.69% (53rd) EPSS

CVSS 4.8 · medium

Is it mine?

43 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

cvss

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

6.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.9–6.3

v3.14.8mediumAV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Lsecondary · FSTEC (BDU) RU

v3.14.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Lsecondary · f5sirt@f5.comexploitability 2.2 · impact 2.5

v4.06.3mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.06.3mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/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

v4.02.9lowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USCWE-416US

exploits (1)

Public proof-of-concept and weaponised exploit code.

edgecases-PurpleHax/cve-imagesIntentionally-vulnerable nginx 1.30.0 CVE lab images (CVE-2026-40701/42934/42945/42946) for isolated security research. Lab use only.PoC · poc_in_github

affected products (43)

Products and version ranges known to be affected.

IBM DB2all versionscert_bundDEcpe:/a:ibm:db2:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Splunk SOAR< 8.6.0cert_bundDE
F5 NGINX Open Source1.19.0 → 1.30.1enisa_euvdEU
F5 NGINX PlusR32 → R32 P6enisa_euvdEU
F5 NGINX PlusR36 → R36 P4enisa_euvdEU
NGINX Inc. F5 DoS for NGINX≤ 4.8.0fstec_bduRU
NGINX Inc. F5 WAF for NGINX5.9.0 → 5.12.1fstec_bduRU
NGINX Inc. NGINX App Protect DoS4.3.0 → 4.7.0fstec_bduRU
NGINX Inc. NGINX App Protect WAF4.9.0 → 4.16.0fstec_bduRU
NGINX Inc. NGINX App Protect WAF5.1.0 → 5.8.0fstec_bduRU
NGINX Inc. NGINX Gateway Fabric1.3.0 → 1.6.2fstec_bduRU
NGINX Inc. NGINX Gateway Fabric2.0.0 → 2.5.1fstec_bduRU
NGINX Inc. NGINX Ingress Controller3.5.0 → 3.7.2fstec_bduRU
NGINX Inc. NGINX Ingress Controller4.0.0 → 4.0.1fstec_bduRU
NGINX Inc. NGINX Ingress Controller5.0.0 → 5.4.1fstec_bduRU
NGINX Inc. NGINX Instance Manager2.16.0 → 2.21.1fstec_bduRU
NGINX Inc. NGINX Open Source1.19.0 → 1.31.0fstec_bduRU
NGINX Inc. NGINX Open Source1.19.0 → 1.30.1fstec_bduRU
NGINX Inc. NGINX PlusR32 → R32 P6fstec_bduRU

showing 20 of 43

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1527NGINX Open Source and NGINX Plus: Mehrere SchwachstellenDeutsch2026-05-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in NGINX Open Source and NGINX Plus ausnutzen, um Sicherheitsvorkehrungen zu umgehen, beliebigen Code auszuführen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.
WID-SEC-W-2026-2933Splunk SOAR: Mehrere SchwachstellenDeutsch2026-08-19csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Splunk SOAR ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen SQL-Injection Angriff durchzuführen, um einen Cross-Site Scripting Angriff durchzuführen, und um beliebigen Programmcode auszuführen.
BIT-nginx-2026-40701NGINX ngx_http_ssl_module vulnerability2026-05-15vendor · osvUS
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
BIT-nginx-gateway-2026-40701NGINX ngx_http_ssl_module vulnerability2026-05-15vendor · osvUS
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund NVD CVE.org MITRE

published 2026-05-13modified 2026-10-26

references (5)

External citations — patches, advisories, analysis.

scry

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