CVE-2026-111943: eMudhra intermediate CA key recovery in AWS trust bundles
Bulletin ID: 2026-150-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 10/24/2026 20:00 PM PDT Summary: AWS identified CVE-2026-111943, a key-generation flaw at external CA eMudhra/emSign that made intermediate CA private keys recoverable. Three roots are affected: AAA Certificate Services, emSign Root TLS CA - G3, and emSign ECC Root CA - G3. They shipped in AWS-owned trust bundles, exposing soft-fail TLS clients to man-in-the-middle risk. AWS is removing the roots. Customers using CloudFront custom origins or ALB OIDC/JWT auth should check whether their certificates chain to an affected root and reissue from a different CA before enforcement. Please refer to th
Read at AWS Security Bulletins
- Vendor
- Amazon Web Services
- Product
- Certificate authorities
- EPSS
- 0.004 (p34)
- Exposure class
- Identity
Why it ranks 38 (Notable)
- Exposed product class: identity
- Widely deployed vendor product (Amazon Web Services)
- Covered by 4 independent sources
- Vendor security advisory
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- AWS Security Bulletins (aws.amazon.com)
- CVE-2026-111943 on this site · NVD · CVE.org · Vulnpedia
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