Topic
2 articles
CyberSecureToday covers SigV4 across 2 articles published between 26 Sep 2026 and 6 Oct 2026.
The coverage includes 2 vulnerability advisories. 2 advisories are rated critical or high severity.
Stories on SigV4 most often intersect with Cloud Security, Amazon Web Services and AWS S3, with Technology, Cloud & SaaS the most affected sector. The most recent story, “AWS S3 Multi-Region Access Point Flaw Enables IAM Signature Version 4 Authorization Bypass CVE-2026-79787”, was published 6 Oct 2026. Every article is listed below, newest first, with the affected products, severity and remediation guidance in each piece.
AWS CloudAWS Security Bulletin details an authorization validation defect in S3 Multi-Region Access Point endpoints permitting IAM privilege escalation.
AWS CloudAWS discloses high-severity SSRF flaw CVE-2026-15643 in the HealthLake MCP server, enabling attackers to leak temporary SigV4 IAM credentials and healthcare FHIR records.