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CVE-2026-8961 Média · 6.5 CWE-290 19/05/2026
Spoofing issue in the Form Autofill component
Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8960 Alta · 7.5 CWE-290 19/05/2026
Spoofing issue in WebExtensions
Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8951 Média · 6.5 CWE-290 19/05/2026
Spoofing issue in the Toolbar component in Firefox for Android
Spoofing issue in the Toolbar component in Firefox for Android. This vulnerability was fixed in Firefox 151.
CVE-2026-7507 Alta · 7.5 CWE-290 19/05/2026
Org.keycloak/keycloak-services: session fixation in oidc login flow that can lead to account takeover
A session fixation vulnerability was found in Keycloak's login-actions endpoints. An unauthenticated attacker could exploit this flaw by pre-creating an authentication session and tricking a victim into visiting a maliciously crafted link. By leveraging the /login-actions/restart endpoint—which processes session handles without adequate CSRF protection or cookie ownership validation—an attacker can reset the authentication flow state. This causes Single Sign-On (SSO) to authenticate the victim transparently upon clicking the link, allowing the attacker to hijack the required-action form without needing the victim's credentials. A successful exploit could lead to complete account takeover, including highly privileged administrative accounts.
CVE-2026-46356 Alta · 7.5 CWE-290 14/05/2026
Fleet: IP spoofing allows bypassing API rate limiting
Fleet is open source device management software. Prior to version 4.80.1, a vulnerability in Fleet's IP extraction logic allows unauthenticated attackers to bypass API rate limiting by spoofing client IP headers. This may allow brute-force login attempts or other abuse against Fleet instances exposed to the public internet. Fleet extracted client IP addresses from request headers (`True-Client-IP`, `X-Real-IP`, `X-Forwarded-For`) without validating that those headers originate from a trusted proxy. The extracted IP is used as the key for rate limiting and IP ban decisions. As a result, an attacker could rotate the value of these headers on each request, causing Fleet to treat each attempt as coming from a different client. This effectively bypasses per-IP rate limits on sensitive endpoints such as the login API, enabling unrestricted brute-force or credential stuffing attacks. This issue primarily affects Fleet instances that are directly exposed to the internet without a reverse proxy that overwrites forwarded-IP headers. Instances behind a properly configured proxy or WAF are less affected. Version 4.80.1 contains a patch. If an immediate upgrade is not possible, administrators should ensure Fleet is deployed behind a reverse proxy (e.g., nginx, Cloudflare, AWS ALB) that overwrites `X-Forwarded-For` with the true client IP, and apply rate limiting at the proxy or WAF layer.
CVE-2026-24899 Alta · 7.5 CWE-290 14/05/2026
Fleet Windows MDM Azure AD JWT Authentication Bypass
Fleet is open source device management software. Prior to version 4.82.0, a vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not enforce the `aud` (audience) or `iss` (issuer) claims, any Microsoft-signed Azure AD access token containing the expected scopes can be used to authenticate to Fleet's MDM endpoints. If Windows MDM is enabled, an attacker with access to any Azure AD tenant can obtain a valid Microsoft-signed token and use it to enroll unauthorized devices and interact with Fleet's MDM management APIs. During device management, Fleet may expose sensitive enrollment secrets embedded in MDM command payloads, enabling further unauthorized access. Version 4.82.0 contains a patch. If an immediate upgrade is not possible, affected Fleet users should temporarily disable Windows MDM.
CVE-2026-24000 Média · 5.3 CWE-290 14/05/2026
Fleet has a rate limiting bypass via untrusted client IP headers
Fleet is open source device management software. Prior to version 4.80.1, Fleet trusted client-supplied IP address headers when determining the source IP for incoming requests. This allowed authenticated and unauthenticated clients to spoof their apparent IP address and bypass per-IP rate limiting controls. Fleet determines a client’s public IP address using HTTP headers such as X-Forwarded-For, X-Real-IP, and/or True-Client-IP. These headers were trusted without validation. An attacker could supply arbitrary values in these headers, causing Fleet to treat each request as originating from a different IP address. This could allow an attacker to bypass per-IP rate limits and increase the effectiveness of brute-force or password-spraying attempts against authentication endpoints. This issue does not allow authentication bypass, privilege escalation, data exposure, or remote code execution on its own. Version 4.80.1 contains a patch. As a workaround, run Fleet behind a trusted reverse proxy or load balancer that overwrites client IP headers.
CVE-2026-40460 Média · 6.5 CWE-290 13/05/2026
NGINX ngx_quic_module vulnerability
When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVE-2026-44183 Crítica · 9.8 CWE-290 12/05/2026
Cleanuparr: bypass de autenticação por X-Forwarded-For forjado no modo reverse proxy
Cleanuparr é uma ferramenta para automatizar a limpeza de arquivos indesejados ou bloqueados no Sonarr, Radarr e em clientes de download compatíveis, como o qBittorrent. Antes da versão 2.9.10, TrustedNetworkAuthenticationHandler.ResolveClientIp interpreta a entrada mais à esquerda do cabeçalho X-Forwarded-For como o IP do cliente. Essa entrada é controlada pelo atacante — X-Forwarded-For é somente de acréscimo (append-only), de modo que o valor mais à esquerda é o que o cliente HTTP original declarou. Ao enviar um IP local forjado no cabeçalho, um atacante remoto não autenticado passa na verificação de rede confiável e é autenticado como administrador do Cleanuparr. Esta vulnerabilidade está corrigida na versão 2.9.10.
CVE-2026-28954 Alta · 7.5 CWE-290 11/05/2026
Authentication Bypass by Spoofing em Apple Ipados
A file quarantine bypass was addressed with additional checks. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. A maliciously crafted disk image may bypass Gatekeeper checks.
CVE-2026-45223 Alta · 8.8 CWE-290 11/05/2026
Crabbox < 0.9.0 Authentication Bypass via Admin Claim Injection
Crabbox before 0.9.0 contains an authentication bypass vulnerability in the coordinator user-token verification path where the verifyUserToken() function fails to reject payloads containing an admin claim, allowing attackers to escalate privileges. An attacker with access to the shared non-admin token can craft a user-token payload with admin: true, sign it using HMAC-SHA256, and present it to admin-only coordinator routes to gain full coordinator admin access including lease visibility, pool state management, and forced release operations.
CVE-2021-47923 Crítica · 9.8 CWE-290 10/05/2026
OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie
OpenCart 3.0.3.8 contains a session fixation vulnerability that allows attackers to hijack user sessions by injecting arbitrary values into the OCSESSID cookie. Attackers can set malicious OCSESSID cookie values that the server accepts and maintains, enabling session takeover and unauthorized access to user accounts.
CVE-2026-42354 Crítica · 9.8 CWE-290 08/05/2026
Sentry: Improper authentication on SAML SSO process allows user identity linking
Sentry is an error tracking and performance monitoring tool. From version 21.12.0 to before version 26.4.1, a critical vulnerability was discovered in the SAML SSO implementation of Sentry. The vulnerability allows an attacker to take over any user account by using a malicious SAML Identity Provider and another organization on the same Sentry instance. The victim email address must be known in order to exploit this vulnerability. This issue has been patched in version 26.4.1.
CVE-2026-6213 Crítica · 10.0 CWE-290 08/05/2026
Bypass da verificação de conexão local no Remote Spark SparkView com execução de código como root
Uma vulnerabilidade no Remote Spark SparkView anterior ao build 1122 permite que um atacante contorne a verificação de conexão local e obtenha execução arbitrária de código como root no lado do servidor. Dependendo da implementação, a vulnerabilidade pode ser explorada por um atacante não autenticado.
CVE-2026-44118 Alta · 7.8 CWE-290 06/05/2026
OpenClaw < 2026.4.22 - Owner Context Spoofing via Bearer Token Header
OpenClaw before 2026.4.22 derives loopback MCP owner context from spoofable server-issued bearer tokens in request headers. Non-owner loopback clients can present themselves as owner to bypass owner-gated operations by manipulating the sender-owner header metadata.
CVE-2026-39858 Crítica · 10.0 CWE-290 30/04/2026
Traefik: Forwarded alias spoofing top pre-auth decision bypass
Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is a high severity authentication bypass vulnerability in Traefik's ForwardAuth and snippet-based authentication middleware. Traefik's forwarded-header sanitization logic targets only canonical header names (e.g., X-Forwarded-Proto) and does not strip or normalize alias variants that use underscores instead of dashes (e.g., X_Forwarded_Proto). These unsanitized alias headers are forwarded intact to the authentication backend. When the backend normalizes underscore and dash header forms equivalently, an attacker can inject spoofed trust context — such as a trusted scheme or host — through the alias headers and bypass authentication on protected routes without valid credentials. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.
CVE-2025-50328 Alta · 7.3 CWE-290 29/04/2026
A vulnerability in B1 Free Archiver v1.5.86 allows files extracted from downloaded…
A vulnerability in B1 Free Archiver v1.5.86 allows files extracted from downloaded archives to bypass Windows Mark of the Web (MotW) protections. When an archive is downloaded from the internet and extracted using B1 Free Archiver, the software fails to propagate the 'Zone.Identifier' alternate data stream to the extracted files. As a result, these files can be executed without triggering Windows Defender SmartScreen warnings or security prompts, enabling untrusted code execution without standard security restrictions.
CVE-2018-25318 Crítica · 9.8 CWE-290 29/04/2026
Tenda FH303/A300 V5.07.68_EN Cookie Session Weakness DNS Change
Tenda FH303/A300 firmware V5.07.68_EN contains a session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient cookie validation. Attackers can send GET requests to the /goform/AdvSetDns endpoint with a crafted admin cookie to change DNS servers and redirect user traffic to malicious sites.
CVE-2018-25317 Crítica · 9.8 CWE-290 29/04/2026
Tenda W3002R/A302/W309R V5.07.64_en Cookie Session Weakness DNS Change
Tenda W3002R/A302/W309R wireless routers version V5.07.64_en contain a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient session validation. Attackers can send GET requests to the /goform/AdvSetDns endpoint with a crafted admin language cookie to change primary and secondary DNS servers, redirecting user traffic to malicious DNS servers.
CVE-2018-25316 Crítica · 9.8 CWE-290 29/04/2026
Tenda W308R v2 V5.07.48 Cookie Session Weakness DNS Change
Tenda W308R v2 V5.07.48 contains a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient session validation. Attackers can send GET requests to the goform/AdvSetDns endpoint with a crafted admin language cookie to change DNS servers and redirect user traffic to malicious sites.
CVE-2026-7422 Média · 6.5 CWE-290 29/04/2026
MAC Address Validation Bypass in FreeRTOS-Plus-TCP IPv4 and IPv6 Packet Processing
Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass all checksum and minimum-size validation by spoofing the Ethernet source MAC address to match one of the device's own registered endpoints, because the loopback detection mechanism skips all input validation for packets whose source MAC matches a local endpoint. To mitigate this issue, users should upgrade to the fixed version when available.
CVE-2026-25660 Crítica · 9.8 CWE-290 24/04/2026
Authentication bypass for certain API calls
CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy. Authentication bypass occurs when the URL ends with Authentication with certain function calls.  This bypass allows assigning arbitrary permission to any user existing in CodeChecker. This issue affects CodeChecker: through 6.27.3.
CVE-2026-40575 Crítica · 9.1 CWE-290 21/04/2026
OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing
OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions 7.5.0 through 7.15.1 may trust a client-supplied `X-Forwarded-Uri` header when `--reverse-proxy` is enabled and `--skip-auth-regex` or `--skip-auth-route` is configured. An attacker can spoof this header so OAuth2 Proxy evaluates authentication and skip-auth rules against a different path than the one actually sent to the upstream application. This can result in an unauthenticated remote attacker bypassing authentication and accessing protected routes without a valid session. Impacted users are deployments that run oauth2-proxy with `--reverse-proxy` enabled and configure at least one `--skip-auth-regex` or `--skip-auth-route` rule. This issue is patched in `v7.15.2`. Some workarounds are available for those who cannot upgrade immediately. Strip any client-provided `X-Forwarded-Uri` header at the reverse proxy or load balancer level; explicitly overwrite `X-Forwarded-Uri` with the actual request URI before forwarding requests to OAuth2 Proxy; restrict direct client access to OAuth2 Proxy so it can only be reached through a trusted reverse proxy; and/or remove or narrow `--skip-auth-regex` / `--skip-auth-route` rules where possible. For nginx-based deployments, ensure `X-Forwarded-Uri` is set by nginx and not passed through from the client.
CVE-2026-6762 Média · 6.3 CWE-290 21/04/2026
Spoofing issue in the DOM: Core & HTML component
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
CVE-2026-22734 Alta · 8.6 CWE-290 16/04/2026
Cloud Foundry UAA SAML 2.0 Signature Bypass
Cloud Foundry UUA is vulnerable to a bypass that allows an attacker to obtain a token for any user and gain access to UAA-protected systems. This vulnerability exists when SAML 2.0 bearer assertions are enabled for a client, as the UAA accepts SAML 2.0 bearer assertions that are neither signed nor encrypted. This issue affects UUA from v77.30.0 to v78.7.0 (inclusive) and it affects CF Deployment from v48.7.0 to v54.14.0 (inclusive).