PT-2026-108897

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...

CVE-2026-103329: Improper Verification of Cryptographic 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...

CVE-2026-107723

fast-jwt provides fast JSON Web Token JWT implementation. Prior to 6.3.0, fast-jwt createVerifier accepts a validly signed JWT whose payload is a JSON array because src/decoder.js checks that the payload is an object but does not reject arrays. The claim validator loop then finds no named exp, nb...

GHSA-8WPC-H4Q6-8FXV fast-jwt: createVerifier accepts unsigned JWTs when key is '' or null and algorithms is explicitly set

Summary createVerifier in fast-jwt ≤ 6.3.0 skips signature verification entirely when the key option is a falsy synchronous value '' or null and the algorithms option is set to a non-empty allowlist. An attacker who can present a JWT to the application — regardless of algorithm — can forge...

Improper Verification of Cryptographic Signature

Overview fast-jwt is a Fast JSON Web Token implementation Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via createVerifier in src/verifier.js, when an empty string or null is passed as the key option. Because the falsy-key branch skipped key...

fast-jwt: createVerifier accepts unsigned JWTs when key is '' or null and algorithms is explicitly set

Summary createVerifier in fast-jwt ≤ 6.3.0 skips signature verification entirely when the key option is a falsy synchronous value '' or null and the algorithms option is set to a non-empty allowlist. An attacker who can present a JWT to the application — regardless of algorithm — can forge...

Improper Verification of Cryptographic Signature

Overview fast-jwt is a Fast JSON Web Token implementation Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the key-type detection logic in src/crypto.js, where a non-whitespace prefix control characters, zero-width Unicode, comments, HTTP/PG...

fast-jwt : Silent claim-validator bypass when JWT payload is a JSON array

Summary fast-jwt's createVerifier silently skips all configured claim validators exp, nbf, iss, aud, sub, jti, nonce when a validly-signed JWT carries a JSON array as its payload instead of an object. The verifier reports success while having enforced only the signature. This breaks the library's...

Improper Verification of Cryptographic Signature

Overview fast-jwt is a Fast JSON Web Token implementation Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via performDetectPublicKeyAlgorithms and performDetectPrivateKeyAlgorithm in src/crypto.js, when a serialized asymmetric JWK or JWKS is...

CVE-2026-107723

The fast-jwt library (versions prior to 6.3.0 ) is vulnerable to a silent claim-validator bypass when a JWT payload is a JSON array . The root cause is located in src/decoder.js, where the system verifies that the payload is an object but fails to reject arrays. Because the claim validator loop l...

CVE-2026-84271

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...

EUVD-2026-95240

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...

CVE-2026-84271

IBM Guardium Data Protection 12.2 contains a signature verification bypass vulnerability within the patch installer. An attacker with local access could exploit this flaw to achieve arbitrary code execution with root privileges . The root cause is identified as a race condition (CWE-362). No spec...

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...

CVE-2026-13257

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 an authenticated user to forge signature requests due to improper verification of data authenticity...

CVE-2026-13257 IBM DataPower Gateway Insufficient Verification of Data Authenticity

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 an authenticated user to forge signature requests due to improper verification of data authenticity...

CVE-2026-13257

The IBM DataPower Gateway is vulnerable to insufficient verification of data authenticity (CWE-345 ) in versions 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. This flaw could allow an authenticated user to forge signature requests . ...

EUVD-2026-95001

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 an authenticated user to forge signature requests due to improper verification of data authenticity...

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...

CVE-2026-14999

The IBM DataPower Gateway versions 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 are vulnerable to an authentication bypass. The root cause is the improper verification of cryptographic signatures , which allows a remote attacker to f...