Weakness (CWE)
CWE-347: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
Source: MITRE CWE-347
19 results · Clear filters · Feed
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High 7.8CVE-2026-97799 Public exploit
Windows Audio Service Elevation of Privilege Vulnerability
Improper verification of cryptographic signature in Windows Audio Service allows an authorized attacker to elevate privileges locally.
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High 7.4CVE-2026-107720 Public exploit
fast-jwt: createVerifier accepts unsigned JWTs when key is '' or null and algorithms is explicitly set
fast-jwt provides fast JSON Web Token (JWT) implementation. Prior to 6.3.1, fast-jwt createVerifier accepts an unsigned JWT when key is an empty string or null and algorithms is a non-empty allowlist. Falsy synchronous keys bypass prepareKeyOrSecret, allowedA…
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High 8.1CVE-2026-87004 Public exploit
Tugtainer: OIDC id_token claims accepted without signature/audience/expiry verification
Tugtainer is a self-hosted app for automating updates of Docker containers. Prior to version 1.31.3, when the OIDC login flow completes, backend/modules/auth/providers/auth_oidc_provider.py decodes the id_token returned by the identity provider's token endpoi…
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High 8.8CVE-2026-65616 Public exploit
Potential privilege escalation to JFrog administrator privileges
Incorrect authorization validation in refresh token signature allows non-admin users to obtain a signed JFrog administrator token.
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High 8.1CVE-2026-11800 Public exploit
Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusion
A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an attacker with valid client credentials to bypass signature verification. By forging an assertion, the attacker can create unauthorized acces…
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High 8.1CVE-2026-10795 Public exploit
UpdraftPlus: WP Backup & Migration Plugin <= 1.26.4 - Unauthenticated Authentication Bypass via UpdraftCentral udrpc
The UpdraftPlus: WP Backup & Migration Plugin plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.26.4 via the UpdraftPlus_Remote_Communications_V2::wp_loaded function. This is due to insufficient validation of …
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High 7.5CVE-2026-44714 Public exploit
bitcoinj: ScriptExecution P2PKH/P2WPKH Verification Bypass
The bitcoinj library is a Java implementation of the Bitcoin protocol. Prior to 0.17.1, ScriptExecution.correctlySpends() contains two fast-path verification bugs for standard P2PKH and native P2WPKH spends in core/src/main/java/org/bitcoinj/script/ScriptExec…
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High 7.5CVE-2026-5050 Public exploit
Payment Gateway for Redsys & WooCommerce Lite <= 7.0.0 - Improper Verification of Cryptographic Signature to Unauthenticated Payment Status Manipulation
The Payment Gateway for Redsys & WooCommerce Lite plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 7.0.0 due to successful_request() handlers calculating a local signature but not validat…
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High 8.1CVE-2026-1529 Public exploit
Org.keycloak.services.resources.organizations: keycloak: unauthorized organization registration via improper invitation token validation
A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attack…
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High 7.5CVE-2025-65945 Public exploit
auth0/node-jws improper HMAC signature verification vulnerability
auth0/node-jws is a JSON Web Signature implementation for Node.js. In versions 3.2.2 and earlier and version 4.0.0, auth0/node-jws has an improper signature verification vulnerability when using the HS256 algorithm under specific conditions. Applications are …
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High 7.0CVE-2025-34324 Public exploit
GoSign Desktop < 2.4.1 Insecure Update Mechanism RCE
GoSign Desktop versions 2.4.0 and earlier use an unsigned update manifest for distributing application updates. The manifest contains package URLs and SHA-256 hashes but is not digitally signed, so its authenticity relies solely on the underlying TLS channel.…
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High 7.6CVE-2025-23369 Public exploit
Improper Verification of Cryptographic Signature in GitHub Enterprise Server Allows Signature Spoofing by Improper Validation
An improper verification of cryptographic signature vulnerability was identified in GitHub Enterprise Server that allowed signature spoofing for unauthorized internal users. Instances not utilizing SAML single sign-on or where the attacker is not already an e…
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High 8.8CVE-2024-7479 Public exploit
Improper signature verification of VPN driver installation in TeamViewer Remote Clients
Improper verification of cryptographic signature during installation of a VPN driver via the TeamViewer_service.exe component of TeamViewer Remote Clients prior version 15.58.4 for Windows allows an attacker with local unprivileged access on a Windows system …
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High 7.7CVE-2024-8698 Public exploit
Keycloak-saml-core: improper verification of saml responses leading to privilege escalation in keycloak
A flaw exists in the SAML signature validation method within the Keycloak XMLSignatureUtil class. The method incorrectly determines whether a SAML signature is for the full document or only for specific assertions based on the position of the signature in the…
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High 7.4CVE-2022-39299 Public exploit
Signature bypass via multiple root elements in Passport-SAML
Passport-SAML is a SAML 2.0 authentication provider for Passport, the Node.js authentication library. A remote attacker may be able to bypass SAML authentication on a website using passport-saml. A successful attack requires that the attacker is in possession…
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High 7.8CVE-2021-1366 Public exploit
Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module DLL Hijacking Vulnerability
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the VPN Posture (HostScan) Module is…
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High 7.5
Improper Verification of Cryptographic Signature in golang.org/x/crypto
golang.org/x/crypto before v0.0.0-20200220183623-bac4c82f6975 for Go allows a panic during signature verification in the golang.org/x/crypto/ssh package. A client can attack an SSH server that accepts public keys. Also, a server can attack any SSH client.
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High 7.5CVE-2019-9153 Public exploit
Message Signature Bypass in openpgp
Improper Verification of a Cryptographic Signature in OpenPGP.js <=4.1.2 allows an attacker to forge signed messages by replacing its signatures with a "standalone" or "timestamp" signature.
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High 7.5
Cisco node-jose improper validation of JWT signature
A vulnerability in the Cisco node-jose open source library before 0.11.0 could allow an unauthenticated, remote attacker to re-sign tokens using a key that is embedded within the token. The vulnerability is due to node-jose following the JSON Web Signature (J…