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Nginx

Vendor security scorecard – 193 CVEs in the selected period

Period: 30d 90d 6m 1y All
Risk 1038
193
CVEs
35
Critical
102
High
0
KEV
35
PoC
38
Unpatched C/H
74.1%
Patch Rate
0.2%
Avg EPSS

Severity Breakdown

CRITICAL
35
HIGH
102
MEDIUM
51
LOW
4

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-2026-27944 Unauthenticated backup download and RCE in Nginx UI before 2.3.3. EPSS 1.0%. PoC available. CRITICAL 9.8 1.0% 70
PoC
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-2025-34203 Vasion Print (formerly PrinterLogic) Virtual Appliance Host versions prior to 22.0.1002 and Application versions prior to 20.0.2614 (VA and SaaS deployments) contain multiple Docker containers that. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available. CRITICAL 9.3 0.1% 67
PoC No patch
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-2025-59951 Docker default credentials in Termix server management. PoC and patch available. CRITICAL 9.1 0.1% 66
PoC
CVE-2026-33186 An authorization bypass vulnerability in gRPC-Go allows attackers to circumvent path-based access control by sending HTTP/2 requests with malformed :path pseudo-headers that omit the mandatory leading slash (e.g., 'Service/Method' instead of '/Service/Method'). This affects gRPC-Go servers using path-based authorization interceptors like google.golang.org/grpc/authz with deny rules for canonical paths but fallback allow rules. The vulnerability has a CVSS score of 9.1 (Critical) with network-based exploitation requiring no privileges or user interaction, enabling attackers to access restricted services and potentially exfiltrate or modify sensitive data. CRITICAL 9.1 0.0% 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-2026-32255 Kan, an open-source project management tool, contains a Server-Side Request Forgery (SSRF) vulnerability in its unauthenticated /api/download/attatchment endpoint in versions 0.5.4 and below. Attackers can exploit this to make arbitrary HTTP requests from the server to internal services, cloud metadata endpoints (such as AWS EC2 metadata at 169.254.169.254), or private network resources without any authentication. With a CVSS score of 8.6 (High) reflecting network-based attack vector, low complexity, and no privileges required, this poses significant risk for confidentiality breaches in affected deployments. HIGH 8.6 0.1% 63
PoC No patch
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

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