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Nginx

Vendor security scorecard – 164 CVEs in the selected period

Period: 30d 90d 6m 1y All
Risk 886
164
CVEs
31
Critical
86
High
0
KEV
29
PoC
31
Unpatched C/H
75.6%
Patch Rate
0.2%
Avg EPSS

Severity Breakdown

CRITICAL
31
HIGH
86
MEDIUM
44
LOW
3

Monthly CVE Trend

Top Risky CVEs

CVE Summary Severity CVSS EPSS Priority Signals
CVE-2026-42945 Heap buffer overflow in NGINX Plus and NGINX Open Source ngx_http_rewrite_module allows remote attackers to crash worker processes and potentially execute code on systems without ASLR. The vulnerability requires specific rewrite directive configurations using PCRE captures with question marks in replacement strings, combined with attacker-crafted HTTP requests and conditions beyond the attacker's control. F5 has released patches addressing this critical flaw. EPSS data unavailable; no KEV listing or public exploit identified at time of analysis, though the specific configuration requirements and dependency on external conditions likely limit widespread exploitation despite the 9.2 CVSS score. CRITICAL 9.2 0.2% 76
PoC
CVE-2026-5524 Arbitrary file upload leading to remote code execution in the Divi Form Builder WordPress plugin (versions through 5.1.8) lets unauthenticated attackers upload executable PHP files and run arbitrary code on the server. Attacker-controlled input from the acceptFileTypes POST parameter is interpolated directly into the file-validation regex in do_image_upload(), allowing alternate PHP extensions (.phtml, .phar, .php5, .php7) that evade the plugin's .php-only .htaccess block - and on Nginx the .htaccess protection does not apply at all. There is no public exploit identified at time of analysis and it is not in CISA KEV, but the CVSS 9.8 rating and Wordfence's technical disclosure make this a high-priority patching target. CRITICAL 9.8 0.5% 70
PoC No patch
CVE-2026-33032 Remote unauthenticated nginx service takeover in nginx-ui's MCP integration allows network attackers to create, modify, or delete nginx configuration files and trigger automatic reloads without authentication. The /mcp_message endpoint lacks authentication middleware while exposing the same MCP tool handlers as the protected /mcp endpoint, and the IP whitelist defaults to empty (allow-all). Attackers can inject malicious server blocks to intercept credentials, exfiltrate backend topology, or crash nginx with invalid configs. CVSS 9.8 (Critical) with network attack vector, no authentication required, and high impact across confidentiality, integrity, and availability. No public exploit identified at time of analysis, though detailed proof-of-concept HTTP request provided in advisory. CRITICAL 9.8 0.1% 69
PoC No patch
CVE-2026-75784 Remote stack-based buffer overflow in the embedded nginx binary (/usr/nginx/sbin/nginx) of the TRENDnet TEW-WLC100 wireless LAN controller, firmware 1v2.07b01, lets remote attackers overflow a fixed-size stack buffer in the HTTP Server-header handling routine FUN_0040da4c. Reported through VulDB with a public proof-of-concept exploit already available, the flaw carries a CVSS 4.0 base score of 9.3 and, per its vector, requires no authentication or user interaction. There is no public exploit identified as being used in active attacks - only a POC exists - but the combination of a network-reachable overflow and released exploit code makes this a high-priority patching candidate. CRITICAL 9.3 1.0% 68
PoC No patch
CVE-2026-42530 Use-after-free in NGINX Open Source's ngx_http_v3_module allows remote unauthenticated attackers to crash worker processes and potentially execute arbitrary code on hosts where HTTP/3 QUIC is enabled. Exploitation requires a specially crafted HTTP/3 session that reopens a QPACK encoder stream, with code execution contingent on ASLR being disabled or bypassed; no public exploit identified at time of analysis, though SSVC technical impact is rated total. CRITICAL 9.2 0.8% 67
PoC
CVE-2026-42055 Heap-based buffer overflow in NGINX Plus and NGINX Open Source affects deployments that proxy HTTP/2 or gRPC traffic upstream when ignore_invalid_headers is off and large_client_header_buffers exceeds 2 MB. Remote unauthenticated attackers sending oversized headers can crash the worker process, and where ASLR is disabled or bypassable, achieve arbitrary code execution. No public exploit identified at time of analysis and CISA SSVC marks exploitation as 'none', but technical impact is rated total. CRITICAL 9.2 0.6% 67
PoC
CVE-2026-9256 Heap buffer overflow in NGINX Plus and NGINX Open Source ngx_http_rewrite_module can be triggered by unauthenticated remote attackers sending crafted HTTP requests that target rewrite directives using overlapping PCRE captures (e.g., $1$2 referencing ^/((.*))$) in redirect or arguments contexts. Impact ranges from worker process crash/restart to arbitrary code execution where ASLR is disabled or bypassed; publicly available exploit code exists, though EPSS exploitation probability is low (0.15%, 35th percentile) and the issue is not in CISA KEV. CRITICAL 9.2 0.1% 66
PoC
CVE-2026-53727 Server-side request forgery in the Ruby css_parser gem (< 3.0.0) lets a remote unauthenticated attacker force the parsing server to issue arbitrary HTTP/HTTPS GET requests, and via an attacker-controlled 3xx redirect to a file:// URI, escalate to arbitrary local file disclosure. The flaw sits in CssParser::Parser#read_remote_file, reachable through load_uri! and any add_block! call that supplies base_uri: - Premailer being the canonical consumer - so a single attacker-planted @import url(...) in parsed CSS reaches the sink. Publicly available exploit code exists (author-supplied PoC); there is no public exploit identified as being used in active campaigns, and it is not listed in CISA KEV. HIGH 8.9 0.5% 65
PoC
CVE-2026-59177 Unauthenticated LAN access to the ESPHome Device Builder dashboard on Home Assistant add-on deployments allows any device on the local network to gain host-equivalent control with no credentials. The ingress site, which deliberately skips authentication because the HA supervisor is supposed to authenticate upstream, was bound to 0.0.0.0 instead of loopback and the supervisor gateway. Because the add-on uses host networking for mDNS, this exposed the no-auth site on the host's LAN interface, directly bypassing the supervisor's authentication layer. An attacker with LAN access can run arbitrary Python via external_components at compile time, execute arbitrary shell through compile/validation subprocesses, and read or write arbitrary files in the config and data directories. No public exploit has been identified at time of analysis. HIGH 8.8 &ndash; 64
PoC
CVE-2026-58467 Arbitrary file disclosure and PHP local file inclusion in Cockpit CMS before release 364 lets unauthenticated remote attackers read files outside the web root and, on certain server setups, cause the application to include() attacker-chosen .php files. The flaw stems from unvalidated PATH_INFO (derived from REQUEST_URI) being used to build filesystem paths without containment checks. Publicly available exploit code exists; it is not listed in CISA KEV and no EPSS score was provided. HIGH 8.2 0.4% 61
PoC
CVE-2026-42221 Unauthenticated attackers can hijack the administrator account during nginx-ui's first-run installation window by claiming the /api/install endpoint before legitimate operators. This race-condition vulnerability in nginx-ui versions 2.0.0 through 2.3.7 bypasses authentication controls entirely, allowing complete instance takeover with attacker-controlled credentials. The request-encryption mechanism protects only transit confidentiality, not authorization. Attack complexity is rated HIGH due to the narrow time window between deployment and legitimate setup completion. EPSS data unavailable; no CISA KEV listing or public POC identified at time of analysis, but exploitation requires only standard HTTP tools and timing. HIGH 8.1 0.1% 61
PoC
CVE-2026-67309 Route-level authentication bypass in Traefik v3.7.0-v3.7.7 allows unauthenticated remote attackers to reach backend endpoints protected by BasicAuth, DigestAuth, or ForwardAuth by exploiting unnormalized dot-segment paths generated by the Kubernetes Ingress NGINX provider's RewriteTarget middleware. When an Ingress path regex captures attacker-controlled text without requiring a path separator (e.g., /api(.*) rewriting to /$1), a crafted request such as /api../admin is rewritten to /../admin and forwarded to a backend that resolves it to /admin - a path secured on a separate Traefik router - entirely bypassing route-level access controls. No public exploit has been identified at time of analysis; a vendor patch is available in v3.7.8. HIGH 7.8 0.5% 59
PoC
CVE-2026-55484 Remote unauthenticated denial-of-service in alos-http, a Linux amd64 Go web framework, allows any network-reachable client to crash the entire server process with a single malformed HTTP request. The flaw exists in the request-line parser's `sanitizeRequestPath` function, which performs an unchecked index into an empty string after stripping a bare query-string path such as `GET ? HTTP/1.1`. Because the panic fires in the connection-worker goroutine before the handler chain, the framework's own `core.Recovery()` middleware cannot intercept it, making the crash total and immediate. A publicly available proof-of-concept exploit exists; the vulnerability is not currently listed in the CISA KEV catalog. HIGH 7.5 0.3% 58
PoC
CVE-2026-19728 Customer-uploaded file disclosure in Extra Product Options Builder for WooCommerce (all versions before 1.2.176) allows unauthenticated requesters who know a file's stored name to retrieve it via an unprotected plugin endpoint, bypassing a missing authorization check (CWE-862). The real-world severity is conditional on web server type: the plugin writes deny-all rules to upload directories, meaning this endpoint only crosses a new security boundary on Apache-hosted sites; on default nginx deployments, those files are already directly URL-accessible and the endpoint adds no measurable additional exposure. Publicly available exploit code exists, but no public exploit identified at time of analysis confirms active exploitation, and EPSS sits at 0.22% (12th percentile) despite the elevated CVSS score. HIGH 7.5 0.2% 58
PoC
CVE-2026-49975 Denial of service in Apache HTTP Server 2.4.17 through 2.4.67 (via the bundled mod_http2 module) allows remote unauthenticated attackers to exhaust server memory by sending crafted HTTP/2 requests whose cookie headers are not correctly counted against LimitRequestFields. Publicly available exploit code exists and a third-party write-up describes a 'hidden HTTP/2 bomb,' but EPSS exploitation probability is currently very low (0.02%, 5th percentile) and the CVE is not on the CISA KEV list. HIGH 7.5 0.0% 58
PoC

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