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
269 results · Clear filters · Feed
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Medium 4.8
Hickory DNS 0.26.0-beta.1 before 0.26.2 Improper NSEC/NSEC3 Signature Validation
Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 accept NSEC and NSEC3 records for DNSSEC nonexistence proofs when any other record with the same owner name passes signature validation. Attackers able to supply DNS …
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Medium 6.6
OpenAM before 16.1.4 SAML 1.x Signature Verification Issuer Impersonation
OpenAM before 16.1.4 does not verify that a signed SAML 1.x assertion or response was signed by the partner named as its issuer, accepting a signature from any certificate in OpenAM's keystore. An attacker holding such a private key, such as a trusted SAML 1.…
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Medium 6.2
Missing GSDX SignatureValue verification
PLCnext Engineer checks GSDX manifest reference digests but does not cryptographically verify the XML `SignatureValue` over canonicalized `SignedInfo`. An unauthenticated local attacker can modify signed GSDML content, update its manifest digest, retain the p…
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Medium 6.4
Dell Alienware Command Center (AWCC), versions prior to 6.14.54.0, contain an Improper Verification of Cryptographic Si…
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Medium 6.4
Dell OpenManage Enterprise, versions prior to 4.8.0, contains an Improper Verification of Cryptographic Signature vulne…
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Medium 5.7
Dell OpenManage Enterprise, versions prior to 4.8.0, contains an Improper Verification of Cryptographic Signature vulne…
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Medium 4.2
@fastify/secure-session vulnerable to signature verification bypass via cookie signature removal
@fastify/secure-session is a session plugin for Fastify that stores an encrypted session in a cookie. In versions 7.5.0 through 8.4.1, when the plugin is configured with the signed cookie option, it calls the cookie unsign routine but, when the signature chec…
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Medium 6.5
Gitea Actions job token spoofing of instance-signed commits
The `GITEA_TOKEN` of a Gitea Actions job authenticates as the `gitea-actions` system user, and the `/api/v1/user` email and GPG key endpoints accepted that user, so a job could register an email address and a GPG key on it; without required email confirmation…
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Medium 6.8
phpMyAdmin through 5.2.3 WebAuthn Two-Factor Authentication Bypass via CustomServer
phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST…
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Medium 5.3
Commerce Stripe - Moderately critical - Improper verification of cryptographic signature - SA-CONTRIB-2026-264
Improper Verification of Cryptographic Signature vulnerability in Drupal Commerce Stripe allows Signature Spoof. This issue affects Commerce Stripe versions: from 0.0.0 to 1.4, from 2.0.0 to 2.2.3.
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Medium 5.9
Botan: CLI utility `ocsp_check` accepts unauthenticated responses
Botan is a C++ cryptography library. From 1.11.34 until 3.13.0, the botan ocsp_check command requested an OCSP response from a certificate's Authority Information Access URL without verifying the response signature or authorizing the signer. A malicious respo…
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Medium 4.3
Microsoft Edge (Chromium-based) Spoofing Vulnerability
Improper verification of cryptographic signature in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
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Medium 5.9
Sensitive information disclosure due to improper token validation. The following products are affected: Acronis Cyber P…
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Medium 6.2
Sensitive information disclosure due to improper token validation. The following products are affected: Acronis Cyber P…
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Medium 6.9
A vulnerability allowing an unauthenticated attacker to bypass REST API authentication with a forged federation token a…
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Medium 6.3
An issue with signature validation was addressed with improved checks. This issue is fixed in iOS 27.2 and iPadOS 27.2,…
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Medium 5.1
ECDSA signature length is not validated in jose, allowing signature malleability
The jose library accepts ECDSA (ES256, ES256K, ES384, and ES512) JWS signatures of a non-canonical length. When verifying an ECDSA signature, jose_jwk_kty_ec:verify/4 in src/jwk/jose_jwk_kty_ec.erl splits the raw signature in half by its actual byte length (s…
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Medium 6.3
JwtVerifierImpl.Verify does not enforce the JWS `crit` header (RFC 7515 §4.1.11)
gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carry…
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Medium 4.8
SAML SSO - Service Provider - Moderately critical - Authentication bypass - SA-CONTRIB-2026-145
Improper Verification of Cryptographic Signature vulnerability in Drupal SAML SSO - Service Provider allows Signature Spoof. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
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Medium 5.1
IBM Db2 Genius Hub Improper verification of cryptographic signature
IBM Db2 Genius Hub 1.0 could allow a local attacker to obtain sensitive information due to improper verification of cryptographic signature.
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Medium 5.9
FlexPrice through 2.1.38 QuickBooks Webhook Signature Verification Bypass
FlexPrice through 2.1.38 contains an authentication bypass vulnerability in HandleQuickBooksWebhook that skips signature verification when the intuit-signature header is omitted. Unauthenticated attackers knowing a tenant and environment ID can replay forged …
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Medium 5.3
CAI Content Credentials | Improper Verification of Cryptographic Signature (CWE-347)
CAI Content Credentials is affected by an Improper Verification of Cryptographic Signature vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized limited wr…
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Medium 5.5
Role: DNS Server Tampering Vulnerability
Improper verification of cryptographic signature in DNS Server allows an authorized attacker to perform tampering locally.
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Medium 5.5
Windows Update Stack Spoofing Vulnerability
Improper verification of cryptographic signature in Windows Update Stack allows an authorized attacker to perform spoofing locally.
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Medium 6.5
hyper-mcp through 0.8.3 Improper Signature Verification of OCI WebAssembly Plugins
hyper-mcp through 0.8.3 contains an improper signature verification vulnerability that allows attackers to load malicious WebAssembly plugins because cosign_verify_args() accepts any signer identity and OIDC issuer by default. Attackers controlling a plugin i…
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Medium 5.3
Super Payments < 1.43.1 - Unauthenticated Payment Confirmation Forgery via Webhook Signature
The Super Payments WordPress plugin before 1.43.1 does not properly verify the authenticity of incoming payment webhook notifications, as the signing key used to validate their signature is empty by default, allowing unauthenticated attackers to forge a valid…
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Medium 5.3
invariant-systems-ai aiir Policy Gate signature verification
A flaw has been found in invariant-systems-ai aiir up to 1.7.0. The affected element is an unknown function of the component Policy Gate Handler. Executing a manipulation can lead to improper verification of cryptographic signature. The attack can be executed…
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Medium 4.7
OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession
OpenAM before 16.1.3 contains an open redirect vulnerability that allows unauthenticated attackers to redirect users by supplying an unverified id_token_hint to the /oauth2/connect/endSession endpoint. Attackers can name any realm client in a forged hint to r…
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Medium 6.4
Apache APISIX: unauthenticated impersonation issue in saml-auth
Improper verification of cryptographic signature vulnerability in Apache APISIX. Any unauthenticated attacker could impersonate any user on every route protected by the saml-auth plugin under default configuration. This issue affects Apache APISIX: from 3.17.…
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Medium 5.3
n8n before 1.123.80, 2.39.6, and 2.40.1 Missing Webhook Signature Verification
n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 fail to verify the x-webflow-signature HMAC in the Webflow Trigger node webhook handler. Unauthenticated attackers can send forged webhook requests with attacker-controlled …
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Medium 5.9
UltrafastSecp256k1: ECDSA adaptor verification accepts non-adaptable pre-signatures due to missing DLEQ binding
UltrafastSecp256k1 is a high-performance, multi-backend secp256k1 engine with reproducible audit evidence, compatibility shims, and profile-based review scopes. Prior to version 4.2.0, UltrafastSecp256k1's ECDSA adaptor pre-signature verification accepts forg…
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Medium 5.7
Contrast before 1.12.1 Insecure LUKS2 Persistent Storage
Contrast is a Kubernetes runtime for confidential containers. In versions before 1.12.1, the secure persistent volume feature is vulnerable to a malicious host supplying a crafted LUKS2 volume to a pod VM. LUKS2 volume metadata is not authenticated and, with …
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Medium 5.3
Zammad: Invalid PGP Detached Signatures Reported as Good Signature on Inbound Mail
Zammad is a web based open source helpdesk/customer support system. In 7.0.3 and 7.1.1, under certain conditions, Zammad's verification of inbound PGP-signed email can mark a message as carrying a valid ("Good") PGP signature from a registered sender key, eve…
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Medium 5.1
IRONMACE Ironshield 1.0.0.167 has a tvk.sys kernel-mode driver that authenticates client executables by checking for ex…
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Medium 5.3
Security vulnerability: Foxit PDF Editor/Reader Fails to Detect Modifications to Signed Documents Displaying Newly Added Content
A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially…
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Medium 6.8
Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password authentication is enabled
A flaw was found in the Kerberos federation provider of Keycloak, an open-source identity and access management solution. When Kerberos password authentication is used without SPNEGO, the system fails to verify the identity of the Key Distribution Center (KDC…
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Medium 5.3
Payment Gateway of Stripe for WooCommerce <= 5.0.8 - Unauthenticated Improper Verification of Cryptographic Signature via woocommerce_api_wt_stripe Webhook Endpoint
The Payment Gateway of Stripe for WooCommerce plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in all versions up to, and including, 5.0.8. This is due to the publicly accessible `woocommerce_api_wt_stripe` webhook endpoi…
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Medium 6.9
Token revocation record built from unverified JWT claims in AshAuthentication
Improper Verification of Cryptographic Signature vulnerability in team-alembic AshAuthentication allows a caller of the token revocation action to neutralise a revocation or write arbitrary rows into the token resource. AshAuthentication.TokenResource.RevokeT…
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Medium 6.6
Security Advisory 0182
The VeloCloud Edge software update workflow may accept update bundles without properly validating their signatures because the workflow does not restrict the digest algorithm used for artifact verification. An attacker with either sufficient privileges to upl…
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Medium 6.5
Doco-CD has an OCI Trust Policy Bypass via Artifact-Contained Configuration
Doco-CD is a GitOps continuous delivery tool that automatically deploys and updates Docker Compose projects/services and Swarm stacks. Prior to version 0.90.1, a trust-boundary flaw in OCI artifact verification allowed artifact-provided deployment config to i…