Read the docs
TI-2026-01327 Aliases CVE-2026-1642GHSA-7chh-rv6q-8pp3

NGINX vulnerability

Priority LOW 36CWE-349Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-345.

Summary

A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0038 32nd percentileScored 2026-11-07
Fix Partial NGINX Open Source (F5): 1.29.5NGINX Plus (F5): R36 P2, R35 P1, R32 P4Red Hat: 17 advisoriesRed Hat: 16 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
F5NGINX Open Source1.3.0 to before 1.29.51.29.5Patch availableCNA
F5NGINX PlusR36 to before R36 P2; R35 to before R35 P1; R34 and later; R33 and later; R32 to before R32 P4R36 P2, R35 P1, R32 P4Patch availableCNA
  • NGINX Open Source VendorF5 Affected 1.3.0 to before 1.29.5 Fixed in 1.29.5 Patch available CNA
  • NGINX Plus VendorF5 Affected R36 to before R36 P2; R35 to before R35 P1; R34 and later; R33 and later; R32 to before R32 P4 Fixed in R36 P2, R35 P1, R32 P4 Patch available CNA

CPE configurations NVD · 17

CPEVersionsRoleVendor
cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*1.2.0 – 1.6.2; 2.0.0 to before 2.4.1VulnerableF5
cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*3.4.0 – 3.7.2; 4.0.0 – 4.0.1; 5.0.0 to before 5.3.3VulnerableF5
cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*2.15.1 – 2.21.0VulnerableF5
cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*1.3.0 to before 1.28.2; 1.29.0 to before 1.29.5VulnerableF5
cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*r33 to before r35VulnerableF5
cpe:2.3:a:f5:nginx_plus:r32:-:*:*:*:*:*:*r32VulnerableF5
cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:*r32 p1VulnerableF5
cpe:2.3:a:f5:nginx_plus:r32:p2:*:*:*:*:*:*r32 p2VulnerableF5
cpe:2.3:a:f5:nginx_plus:r32:p3:*:*:*:*:*:*r32 p3VulnerableF5
cpe:2.3:a:f5:nginx_plus:r33:p1:*:*:*:*:*:*r33 p1VulnerableF5
  • cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:* Versions 1.2.0 – 1.6.2; 2.0.0 to before 2.4.1 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:* Versions 3.4.0 – 3.7.2; 4.0.0 – 4.0.1; 5.0.0 to before 5.3.3 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:* Versions 2.15.1 – 2.21.0 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* Versions 1.3.0 to before 1.28.2; 1.29.0 to before 1.29.5 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:* Versions r33 to before r35 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r32:-:*:*:*:*:*:* Versions r32 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:* Versions r32 p1 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r32:p2:*:*:*:*:*:* Versions r32 p2 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r32:p3:*:*:*:*:*:* Versions r32 p3 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r33:p1:*:*:*:*:*:* Versions r33 p1 Vulnerable ·F5
Show 7 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:f5:nginx_plus:r33:p2:*:*:*:*:*:*r33 p2VulnerableF5
cpe:2.3:a:f5:nginx_plus:r33:p3:*:*:*:*:*:*r33 p3VulnerableF5
cpe:2.3:a:f5:nginx_plus:r34:p1:*:*:*:*:*:*r34 p1VulnerableF5
cpe:2.3:a:f5:nginx_plus:r34:p2:*:*:*:*:*:*r34 p2VulnerableF5
cpe:2.3:a:f5:nginx_plus:r35:-:*:*:*:*:*:*r35VulnerableF5
cpe:2.3:a:f5:nginx_plus:r36:-:*:*:*:*:*:*r36VulnerableF5
cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:*r36 p1VulnerableF5
  • cpe:2.3:a:f5:nginx_plus:r33:p2:*:*:*:*:*:* Versions r33 p2 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r33:p3:*:*:*:*:*:* Versions r33 p3 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r34:p1:*:*:*:*:*:* Versions r34 p1 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r34:p2:*:*:*:*:*:* Versions r34 p2 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r35:-:*:*:*:*:*:* Versions r35 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r36:-:*:*:*:*:*:* Versions r36 Vulnerable ·F5
  • cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:* Versions r36 p1 Vulnerable ·F5

Remediation

  • Fix · CNA NGINX Open Source (F5) Fixed in 1.29.5
  • Fix · CNA NGINX Plus (F5) Fixed in R36 P2, R35 P1, R32 P4

Red Hat 17 advisories

  • RHSA-2026:10065 Released 2026-04-23 · Red Hat rating Important
    Red Hat Update Infrastructure 5.1 security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9, registry.redhat.io/rhui5/installer-rhel9 +1
  • RHSA-2026:8346 Released 2026-04-15 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nginx-1.30.0-1.hum1@aarch64, nginx-1.30.0-1.hum1@src, nginx-1.30.0-1.hum1@x86_64 +22
  • RHSA-2026:6427 Released 2026-04-02 · Red Hat rating Moderate
    nginx:1.26 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) nginx-2:1.26.3-1.module+el9.6.0+24147+8a39592f.1.aarch64::nginx:1.26, nginx-2:1.26.3-1.module+el9.6.0+24147+8a39592f.1.ppc64le::nginx:1.26, nginx-2:1.26.3-1.module+el9.6.0+24147+8a39592f.1.s390x::nginx:1.26 +32
Show 14 more Red Hat advisories
  • RHSA-2026:6407 Released 2026-04-01 · Red Hat rating Moderate
    nginx:1.24 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) nginx-1:1.24.0-1.module+el9.4.0+24149+3a2a68ad.3.aarch64::nginx:1.24, nginx-1:1.24.0-1.module+el9.4.0+24149+3a2a68ad.3.ppc64le::nginx:1.24, nginx-1:1.24.0-1.module+el9.4.0+24149+3a2a68ad.3.s390x::nginx:1.24 +32
  • RHSA-2026:6408 Released 2026-04-01 · Red Hat rating Moderate
    nginx security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) nginx-1:1.20.1-10.el9_0.2, nginx-all-modules-1:1.20.1-10.el9_0.2, nginx-filesystem-1:1.20.1-10.el9_0.2 +5
  • RHSA-2026:6311 Released 2026-04-01 · Red Hat rating Moderate
    nginx security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) nginx-2:1.26.3-1.el10_0.3, nginx-all-modules-2:1.26.3-1.el10_0.3, nginx-core-2:1.26.3-1.el10_0.3 +6
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) nginx-mod-devel-2:1.26.3-1.el10_0.3
  • RHSA-2026:6302 Released 2026-03-31 · Red Hat rating Moderate
    nginx:1.24 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) nginx-1:1.24.0-4.module+el9.6.0+24139+44cdd49a.1.aarch64::nginx:1.24, nginx-1:1.24.0-4.module+el9.6.0+24139+44cdd49a.1.ppc64le::nginx:1.24, nginx-1:1.24.0-4.module+el9.6.0+24139+44cdd49a.1.s390x::nginx:1.24 +32
  • RHSA-2026:6234 Released 2026-03-31 · Red Hat rating Moderate
    nginx security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) nginx-mod-devel-1:1.20.1-16.el9_4.4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) nginx-1:1.20.1-16.el9_4.4, nginx-all-modules-1:1.20.1-16.el9_4.4, nginx-core-1:1.20.1-16.el9_4.4 +6
  • RHSA-2026:6235 Released 2026-03-31 · Red Hat rating Moderate
    nginx security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) nginx-1:1.20.1-14.el9_2.4, nginx-all-modules-1:1.20.1-14.el9_2.4, nginx-core-1:1.20.1-14.el9_2.4 +6
  • RHSA-2026:6182 Released 2026-03-30 · Red Hat rating Moderate
    nginx security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) nginx-mod-devel-2:1.20.1-22.el9_6.4
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) nginx-2:1.20.1-22.el9_6.4, nginx-all-modules-2:1.20.1-22.el9_6.4, nginx-core-2:1.20.1-22.el9_6.4 +6
  • RHSA-2026:5599 Released 2026-03-24 · Red Hat rating Moderate
    nginx security update
    • Red Hat Enterprise Linux AppStream (v. 9) nginx-2:1.20.1-24.el9_7.1, nginx-all-modules-2:1.20.1-24.el9_7.1, nginx-core-2:1.20.1-24.el9_7.1 +6
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) nginx-mod-devel-2:1.20.1-24.el9_7.1
  • RHSA-2026:5581 Released 2026-03-24 · Red Hat rating Moderate
    nginx:1.24 security update
    • Red Hat Enterprise Linux AppStream (v. 8) nginx-1:1.24.0-2.module+el8.10.0+24013+f603d2af.aarch64::nginx:1.24, nginx-1:1.24.0-2.module+el8.10.0+24013+f603d2af.ppc64le::nginx:1.24, nginx-1:1.24.0-2.module+el8.10.0+24013+f603d2af.s390x::nginx:1.24 +28
  • RHSA-2026:4943 Released 2026-03-18 · Red Hat rating Important
    Red Hat Update Infrastructure 5.1 security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9, registry.redhat.io/rhui5/installer-rhel9 +1
  • RHSA-2026:4705 Released 2026-03-17 · Red Hat rating Moderate
    nginx security update
    • Red Hat Enterprise Linux AppStream (v. 10) nginx-2:1.26.3-2.el10_1, nginx-all-modules-2:1.26.3-2.el10_1, nginx-core-2:1.26.3-2.el10_1 +6
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) nginx-mod-devel-2:1.26.3-2.el10_1
  • RHSA-2026:4501 Released 2026-03-12 · Red Hat rating Important
    A Subscription Management tool for finding and reporting Red Hat product usage
    • Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
  • RHSA-2026:4235 Released 2026-03-10 · Red Hat rating Moderate
    nginx:1.26 security update
    • Red Hat Enterprise Linux AppStream (v. 9) nginx-2:1.26.3-2.module+el9.7.0+24008+f3da7534.aarch64::nginx:1.26, nginx-2:1.26.3-2.module+el9.7.0+24008+f3da7534.ppc64le::nginx:1.26, nginx-2:1.26.3-2.module+el9.7.0+24008+f3da7534.s390x::nginx:1.26 +32
  • RHSA-2026:3638 Released 2026-03-03 · Red Hat rating Moderate
    nginx:1.24 security update
    • Red Hat Enterprise Linux AppStream (v. 9) nginx-1:1.24.0-5.module+el9.7.0+24009+e763bdd7.1.aarch64::nginx:1.24, nginx-1:1.24.0-5.module+el9.7.0+24009+e763bdd7.1.ppc64le::nginx:1.24, nginx-1:1.24.0-5.module+el9.7.0+24009+e763bdd7.1.s390x::nginx:1.24 +32

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Lightspeed proxy 1AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2026:6234
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:6182
Red Hat Discovery 2Fixed RHSA-2026:4501
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:4705
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:5581
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:3638, RHSA-2026:4235, RHSA-2026:5599
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:6408
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:6235
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:6311
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:6234, RHSA-2026:6407
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:6182, RHSA-2026:6302, RHSA-2026:6427
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:4705
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:5599
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:6311
Red Hat Hardened ImagesFixed RHSA-2026:8346
Red Hat Update Infrastructure 5Fixed RHSA-2026:10065, RHSA-2026:4943
Not affected: 4 products
  • Red Hat CodeReady Linux Builder EUS (v.9.6)
  • Red Hat Discovery 2
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • Red Hat Update Infrastructure 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-1642
  2. 2026-10-03 Alias added: GHSA-7chh-rv6q-8pp3

References

Advisory 2

  • TI-2026-31136 NGINX ngx_http_rewrite_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30813 NGINX Map directive and Regex matching vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-08132 NGINX ngx_http_rewrite_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30812 NGINX Open-Source ngx_http_v3_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-30432 NGINX ngx_http_proxy_v2_module and ngx_http_grpc_module vulnerability CVSS 4.0CRITICAL 9.2
  • TI-2026-42786 NGINX ngx_http_slice_module vulnerability CVSS 4.0HIGH 8.8
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences