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K000162097: NGINX map directive and regex matching vulnerability CVE-2026-42533

🗓️ 15 Jul 2026 13:44:02Reported by f5Type 
f5
 f5
🔗 my.f5.com👁 3 Views

NGINX map regex bug can cause heap overflow leading to DoS or code execution (CVE-2026-42533).

Related
Detection
ReporterTitlePublishedViews
Family
Circl
CVE-2026-42533
15 Jul 202615:50
circl
CVE
CVE-2026-42533
15 Jul 202614:33
cve
Cvelist
CVE-2026-42533 NGINX Map directive and Regex matching vulnerability
15 Jul 202614:33
cvelist
EUVD
EUVD-2026-44683
15 Jul 202614:33
euvd
F5 Networks
K000161837: Out-of-band Security Notification (July 15, 2026)
15 Jul 202613:46
f5
Nginx
Buffer overflow when using map and regex
15 Jul 202614:33
nginx
NVD
CVE-2026-42533
15 Jul 202615:16
nvd
Positive Technologies
PT-2026-60178
15 Jul 202600:00
ptsecurity
Vulnrichment
CVE-2026-42533 NGINX Map directive and Regex matching vulnerability
15 Jul 202614:33
vulnrichment
Vulners
Node
f5nginx_plusRange37.0.0.137.0.2.1
OR
f5nginx_plusRangeR33R36
OR
f5nginx_open_sourceRange1.31.21.31.3
OR
f5nginx_open_sourceRange1.30.01.30.3
OR
f5nginx_instance_managerRange2.17.02.22.1
OR
f5wafRange5.9.05.13.3nginx
OR
f5nginx_app_protect_wafRange5.2.05.8.0
OR
f5nginx_app_protect_wafRange4.11.04.16.0
OR
f5nginx_gateway_fabricRange2.0.02.6.6
OR
f5nginx_gateway_fabricRange1.3.01.6.2
OR
f5nginx_ingress_controllerRange5.0.05.5.2
OR
f5nginx_ingress_controllerRange4.0.04.0.1
OR
f5nginx_ingress_controllerRange3.5.03.7.2

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15 Jul 2026 13:44Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.18.1
CVSS 49.2
SSVC
3