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CWE-436 (解释冲突) — Vulnerability Class 72

72 vulnerabilities classified as CWE-436 (解释冲突). AI Chinese analysis included.

CWE-436, Interpretation Conflict, is a design weakness occurring when two interacting components, such as a client and server or an intermediary proxy, interpret the same input or state differently. This discrepancy typically arises in security appliances like firewalls or anti-virus software that modify traffic based on conflicting expectations of protocol behavior. Attackers exploit this by crafting malicious payloads that trigger divergent interpretations, causing the security device to permit harmful data or the target system to execute unintended actions. To mitigate this risk, developers must ensure consistent parsing logic across all interacting components. Implementing strict, unified protocol standards and rigorous validation checks at every processing stage helps eliminate ambiguity. Additionally, thorough integration testing that simulates edge-case scenarios can reveal interpretation mismatches before deployment, ensuring that all entities in the communication chain process data uniformly and securely.

MITRE CWE Description
Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state. This is generally found in proxies, firewalls, anti-virus software, and other intermediary devices that monitor, allow, deny, or modify traffic based on how the client or server is expected to behave.
Common Consequences (1)
Integrity, Other Unexpected State, Varies by Context
Examples (2)
The paper "Insertion, Evasion, and Denial of Service: Eluding Network Intrusion Detection" [REF-428] shows that OSes varied widely in how they manage unusual packets, which made it difficult or impossible for intrusion detection systems to properly detect certain attacker manipulations that took advantage of these OS differences.
Null characters have different interpretations in Perl and C, which have security consequences when Perl invokes C functions. Similar problems have been reported in ASP [REF-429] and PHP.
CVE ID Title CVSS Severity Published
CVE-2026-85184 @fastify/middie vulnerable to path-scoped middleware bypass via absolute-form request target — @fastify/middie 9.1 Critical 2026-09-04
CVE-2026-84394 fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority — fast-uri 7.5 High 2026-09-02
CVE-2026-63435 Mail: Email address spoofing via malformed RFC 2047 encoded-words — mail 5.3 Medium 2026-09-01
CVE-2026-75931 fast-uri vulnerable to host confusion via skipped IDN canonicalization on scheme-relative references — fast-uri 7.5 High 2026-08-24
CVE-2026-57580 authentik: Account Takeover via SAML NameID Comment Truncation — authentik 9.4 Critical 2026-08-18
CVE-2026-73615 Network-AI SandboxPolicy before 5.15.1 Blocklist Bypass via Quote Mismatch — Network-AI 8.8 High 2026-08-13
CVE-2026-73614 Network-AI ClaudeHookBridge Deny Pattern Bypass via Truncation — Network-AI 8.8 High 2026-08-13
CVE-2026-49473 @cedar-policy/authorization-for-expressjs has an authorization bypass via query string manipulation — authorization-for-expressjs 8.8 High 2026-08-12
CVE-2026-18246 IBM i is Affected By security restrictions bypass in Navigator for i — i 3.0 Low 2026-08-12
CVE-2026-68968 Apache Airflow: Authorization bypass in the Backfill API through conflicting interpretations of the backfill id — Apache Airflow - - 2026-08-12
CVE-2026-18446 fast-uri vulnerable to host confusion via backslash authority introducer — fast-uri 7.5 High 2026-07-31
CVE-2026-14643 undici vulnerable to cross-user information disclosure via whitespace around equals in Cache-Control directives — undici 5.9 Medium 2026-07-29
CVE-2026-67201 V 0.5.2 SSRF Bypass via Parser Differential in net.urllib and net.http — v 8.6 High 2026-07-29
CVE-2026-49332 Openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams — Red Hat OpenShift Container Platform 4.12 8.5 High 2026-07-28
CVE-2026-16221 fast-uri vulnerable to host confusion via literal backslash authority delimiter — fast-uri 7.5 High 2026-07-19
CVE-2026-44974 Parameter smuggling in @hapi/content header parser allows upload-filter bypass via duplicate parameters — content - - 2026-07-17
CVE-2026-47767 Symfony: SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch — symfony - - 2026-07-14
CVE-2026-56329 Capgo - Cross-Tenant Preview Namespace Collision via Non-Bijective Underscore Decoding — Capgo 6.4 Medium 2026-07-10
CVE-2026-59882 guzzlehttp/psr7: Host Confusion via Weak URI Host Validation — psr7 4.2 Medium 2026-07-08
CVE-2026-14198 @fastify/middie vulnerable to authorization bypass via encoded slash in path parameter values — @fastify/middie 9.1 Critical 2026-07-01
CVE-2026-13676 fast-uri vulnerable to host confusion via failed IDN canonicalization — fast-uri 7.5 High 2026-06-29
CVE-2026-53538 Python-Multipart: Semicolon treated as querystring field separator enables parameter smuggling — python-multipart 3.7 Low 2026-06-22
CVE-2026-53655 node-tar applies PAX size override to intermediary GNU long-name/long-link headers, causing tar parser interpretation differential (file smuggling) — node-tar - - 2026-06-22
CVE-2026-40930 LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body — libpng 5.4 Medium 2026-06-04
CVE-2026-47076 SSRF allowlist bypass via percent-encoded host in hackney — hackney - - 2026-05-25
CVE-2026-42551 Flight: HTTP method override enabled by default enables CSRF escalation and middleware bypass in flightphp/core — core 7.5 High 2026-05-13
CVE-2026-44576 Next.js: Cache poisoning in React Server Component responses — next.js 5.4 Medium 2026-05-13
CVE-2026-42273 Heimdall: Case-sensitive host matching may lead to policy bypass — heimdall 5.3AI Medium AI 2026-05-08
CVE-2026-42272 Heimdall: Case-sensitive handling of URL-encoded slashes may lead to inconsistent path interpretation — heimdall 9.1AI Critical AI 2026-05-08
CVE-2026-30246 github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters — fiber 6.5 Medium 2026-05-05

Vulnerabilities classified as CWE-436 (解释冲突) represent 72 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.