Home/CWE/Improper Verification of Cryptographic Signature
Weakness

Improper Verification of Cryptographic Signature

CWE-347 · Base · Draft

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

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Weakness Relationships

Where this weakness sits in the CWE hierarchy. Walk up to broader classes or down to more specific variants.
Parent of this (broader)
ChildOfCWE-345 · Insufficient Verification of Data Authenticity
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Attack Patterns (CAPEC)

2
How adversaries exploit this weakness, per MITRE CAPEC.
CAPEC-463Padding Oracle Crypto Attack
CAPEC-475Signature Spoofing by Improper Validation
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CVEs With This Weakness

789
A sample of the 789 CVEs tagged with this weakness.
CVECVE-2026-7689
CVECVE-2026-6986
CVECVE-2026-6966
CVECVE-2026-6911
CVECVE-2026-6328
CVECVE-2026-5466
CVECVE-2026-5050
CVECVE-2026-4600
CVECVE-2026-4600
CVECVE-2026-4541
CVECVE-2026-4478
CVECVE-2026-44714
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Nuclei Scanner Templates

3
Open-source Nuclei templates that detect this weakness class - an actionable scan-for-it pivot. Licensed under the ProjectDiscovery / Nuclei terms.
criticalDataEase v2.10.2 - JWT Signature Verification Bypass
highexacqVision Web Service - Remote Code Execution
highKeycloak - SAML Core Package Signature Validation Flaw
External lookups - second-class, for what we don’t hold ourselves
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