CWE-347Base5 in KEV

Improper Verification of Cryptographic Signature

Draft in the CWE catalog · 669 CVEs mapped

669
CVEs mapped
5
In KEV
7.5
Median CVSS
What it is

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

Recent examples
7.1cvss
CVE-2026-115374

Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Unsigned Header Bypass in Presigned S3 Upload URLs

Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.

HIGHno explanation yet
—
epss
—none
CVE-2026-84918

Monobank payment API - Moderately critical - Access bypass - SA-CONTRIB-2026-130

Improper Verification of Cryptographic Signature vulnerability in Drupal Monobank payment API allows Signature Spoof. This issue affects Monobank payment API versions: from 0.0.0 to 1.0.3.

no explanation yet
—
epss
—none
CVE-2026-87947

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.

no explanation yet
—
epss
The record
Technical detail
CWE ID
CWE-347
Abstraction
Base
Structure
Simple
Status
Draft