CVE-2026-86405
Improper verification of cryptographic signature vulnerability in Sipay Electronic Money and Payment Services Inc. PrestaShop Virtual POS Mo
CVSS
9.8
Critical
EPSS
0.2%
p9
KEV
—
Exploit Today
3
0-100
Published: Oct 9, 2026 · Last modified: Oct 9, 2026 · CWE-347
0.2%EPSS · 30 days0.2%
2026-10-102026-10-12
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.
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-1039027.5 HIG—
——0Improper 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 3.1.0.1dCVE-2026-1086996.5 MED1.9%
——1hyper-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.2dCVE-2026-106581—0.1%
——0Before 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.4dCVE-2026-855319.8 CRI9.2%
——3Improper 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 26.9.1.4dCVE-2026-1033295.3 MED2.2%
——1The 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.4dCVE-2026-1077247.4 HIG11.7%
——4fast-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 6.3.0.4d