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CVE-2026-109838

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.

CVSS 3.1 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Ibm
Products
Db2 Genius Hub
CVE-2026-85962

Improper authentication in Progress MarkLogic Server SAML processing

Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 contain an improper authentication vulnerability in SAML processing. In deployments that use SAML authentication, an unauthenticated remote attacker could cause the affected server to accept an assertion that should be rejected, potentially resulting in unauthorized access.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Progress Software Corporation
Products
Marklogic Server
CVE-2026-103902

DigiDoc improper signature verification

Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Digidoc
Products
Digidoc4 Digidoc Android Digidoc Ios and 1 more
CVE-2026-103297

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 write access. Exploitation of this issue does not require user interaction.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Adobe
Products
C2pa C2pa-web C2patool
CVE-2026-14497

IBM DataPower Gateway Improper Verification of Cryptographic Signature

IBM DataPower Gateway 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2 could allow a remote authenticated attacker to bypass security restrictions due to improper verification of cryptographic signatures.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Ibm
Products
Datapower Gateway Datapower Gateway 1050 Datapower Gateway 1060 and 2 more
CVE-2023-4807

POLY1305 MAC implementation corrupts XMM registers on Windows

Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that might corrupt the internal state of applications on the Windows 64 platform when running on newer X86_64 processors supporting the AVX512-IFMA instructions. Impact summary: If in an application that uses the OpenSSL library an attacker can influence whether the POLY1305 MAC algorithm is used, the application state might be corrupted with various application dependent consequences. The POLY1305 MAC (message authentication code) implementation in OpenSSL does not save the contents of non-volatile XMM registers on Windows 64 platform when calculating the MAC of data larger than 64 bytes. Before returning to the caller all the XMM registers are set to zero rather than restoring their previous content. The vulnerable code is used only on newer x86_64 processors supporting the AVX512-IFMA instructions. The consequences of this kind of internal application state corruption can be various - from no consequences, if the calling application does not depend on the contents of non-volatile XMM registers at all, to the worst consequences, where the attacker could get complete control of the application process. However given the contents of the registers are just zeroized so the attacker cannot put arbitrary values inside, the most likely consequence, if any, would be an incorrect result of some application dependent calculations or a crash leading to a denial of service. The POLY1305 MAC algorithm is most frequently used as part of the CHACHA20-POLY1305 AEAD (authenticated encryption with associated data) algorithm. The most common usage of this AEAD cipher is with TLS protocol versions 1.2 and 1.3 and a malicious client can influence whether this AEAD cipher is used by the server. This implies that server applications using OpenSSL can be potentially impacted. However we are currently not aware of any concrete application that would be affected by this issue therefore we consider this a Low severity security issue. As a workaround the AVX512-IFMA instructions support can be disabled at runtime by setting the environment variable OPENSSL_ia32cap: OPENSSL_ia32cap=:~0x200000 The FIPS provider is not affected by this issue.

CVSS 3.1 · 7.8 High EPSS 1.6% KEV · Not listed
Vendors
Openssl
Products
Openssl
CVE-2026-14999

IBM DataPower Gateway Improper Verification of Cryptographic Signature

IBM DataPower Gateway 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2 could allow a remote attacker to bypass authentication by forging valid JSON Web Signatures due to improper verification of cryptographic signatures.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Vendors
Ibm
Products
Datapower Gateway Datapower Gateway 1050 Datapower Gateway 1060 and 2 more
CVE-2026-108971

D-Link DCS-930L Emergency HTTP Recovery Server bootloader_region.bin mpfd_decode signature verification

A flaw has been found in D-Link DCS-930L B1.08B4. This impacts the function mpfd_decode of the file bootloader_region.bin of the component Emergency HTTP Recovery Server. Executing a manipulation of the argument firmware can lead to improper verification of cryptographic signature. The attack may be performed from remote. The exploit has been published and may be used.

CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
Vendors
D-link
Products
Dcs-930l
CVE-2026-102866

Microsoft Office SharePoint Elevation of Privilege Vulnerability

Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
Sharepoint Server
CVE-2026-108699

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 image reference can sign a malicious image with a free Sigstore keyless certificate to execute plugins with configured host, filesystem, and environment capabilities.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
Vendors
Hyper-mcp-rs
Products
Hyper-mcp
CVE-2026-107722

fast-jwt: Incomplete patch of CVE-2026-34950: Non-whitespace key-prefix re-enables RSA→HS256 algorithm confusion

fast-jwt provides fast JSON Web Token (JWT) implementation. From 6.2.0 until 6.3.0, fast-jwt can misclassify RSA public-key text as an HMAC secret when the key has non-whitespace content before its PEM header. In src/crypto.js, performDetectPublicKeyAlgorithms trims whitespace but publicKeyPemMatcher remains start-anchored, so comments, control characters, zero-width characters, or wrapper text can prevent PEM detection and reach the HMAC fallback. An attacker who knows the public key bytes can sign arbitrary HS256 claims with that public material when HS256 is inferred or allowed, resulting in authentication or authorization bypass. An asymmetric-only algorithm allowlist prevents the attack. This issue is fixed in version 6.3.0.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Vendors
Nearform
Products
Fast-jwt
CVE-2026-86405

Payment Validation Bypass in Sipay Electronic Money's SanalPos PrestaShop

Improper verification of cryptographic signature vulnerability in Sipay Electronic Money and Payment Services Inc. PrestaShop Virtual POS Module allows Signature Spoofing by Improper Validation. This issue affects PrestaShop Virtual POS Module: from 26.8.1 before 26.9.1.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Vendors
Sipay Electronic Money And Payment Services
Products
Prestashop Virtual Pos Module
CVE-2026-85531

Payment Validation Bypass in Sipay Electronic Money's OpenCart 3.x

Improper verification of cryptographic signature vulnerability in Sipay Electronic Money and Payment Services Inc. OpenCart Virtual POS Module allows Signature Spoofing by Improper Validation. This issue affects OpenCart Virtual POS Module: from 26.8.2 before 26.9.1.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Vendors
Sipay Electronic Money And Payment Services
Products
Opencart Virtual Pos Module
CVE-2026-106581

Docker Desktop for Windows installer failed to verify external packages

Before 4.92.0, Docker Desktop for Windows did not verify the signature of a package supplied to Docker Desktop Installer.exe install -package. An attacker able to provide a crafted package and convince a user to approve the Docker-signed UAC prompt could execute attacker-controlled installer actions as LocalSystem.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Docker
Products
Desktop
CVE-2026-103329

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 signature and mark arbitrary WooCommerce orders as paid without payment.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
—
Products
—
CVE-2026-84271

IBM Guardium Data Protection Signature Verification Bypass

IBM Guardium Data Protection 12.2 is vulnerable to a signature verification bypass in the patch installer. An attacker with local access could exploit this vulnerability to execute arbitrary code with root privileges.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Ibm
Products
Guardium Data Protection
CVE-2026-107724

fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgery

fast-jwt provides fast JSON Web Token (JWT) implementation. In 6.2.4, fast-jwt can classify raw serialized public JWK or JWKS JSON as an HMAC secret because src/crypto.js performDetectPublicKeyAlgorithms treats non-PEM strings as symmetric key material. If HS256 is explicitly allowed or inferred, an attacker who knows the exact serialized public-key bytes can use those bytes as an HMAC key and create a token containing arbitrary claims that createVerifier accepts. Serialization ordering or whitespace differences can prevent exploitation, and applications using supported PEM keys with an asymmetric-only algorithm allowlist are not affected. This issue is fixed in version 6.3.0.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Vendors
Nearform
Products
Fast-jwt
CVE-2026-107720

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, allowedAlgorithms remains active, hasKey is false, and the empty signature avoids the verifySignature gate. An attacker can therefore submit a token containing arbitrary claims without possessing a signing key, resulting in authentication or authorization bypass. Claim validators still run, and non-empty keys, an empty key without algorithms, and the async key resolver path do not have this behavior. This issue is fixed in version 6.3.1.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Vendors
Nearform
Products
Fast-jwt